It's because life is better that way.
It is not just the repair and maker culture, but fine craftmanship which has gone, perhaps by the wayside. And the reason for it is that, for instance, Ikea delivers acceptably stylish and affordable furniture, so that instead of one person owning a very fine Chippendale writing desk, 1,000,000 people get to own a desk they like (and bought for 1/1000th of the cost of the Chippendale). The cumulative wellbeing of mankind actually increases even if the quality-of-the-mainstream-product decreases.
A similar argument can be made in defense of Walmart -- please bear with me --. The wages and productivity of a single person manufacturing widgets in the US is equivalent to that 5, 10, 30 families in China. I am making the assertion that benefiting 30 poor families in China is better than benefitting one family in the US, but we can have that fight later.
Let us be very conscious and careful here, since there are two ways to perceive (and therefore two ways to behave) in regards to this. One position is petulant and incredibly selfish: "Weeell, I am a fixer and a maker and omg such a hacker, and the world just is not catering to my desire to have things that are makable, fixable, hackable....". In that case, go live in Chad for a while.
The other position (I think) is a bit more sensible: "I am a guy (which stands for 'person' anymore in a colloquial context) engaged with the world; I understand the Physics, I understand Technology, I do things for myself, I am self-reliable, I am capable: and I sense a loss to the world, that it is less because there are less people who understand the Physics, or the Plumbing, for that matter. This people have become dependent on the incredible luxury that the markets offer us, as opposed to being active, sophisticated masters of their own lives, empowered by their knowledge."
The second position is one of moral stewardship of mankind, of aesthetic assertiveness. It encompasses both pathos and ethos.
Having said that, we have won -- perhaps a Pyrric victory, but we have won. The first day I saw a website used in an advertisement, I knew we had won (and lost). We won the day NASDAQ opened for trading. We won the day Linus posted the Linux kernel to UUNET (v0.92, IIRC). I know we won the first time I ran Mosaic 1.0 (and what a colossal POS it was).
I now work in a company where geeks (ok, maybe just most), are not the bullied, milk-money-bereft losers (with apologies) I met 20 years ago, but modern types which demonstrate that a technological bend exists in most anybody.
We have always existed; we were tradesmen, inventor-nobles, natural philosophers. We were the surveyors of the Floods of the Nile working for the Pharaoh's court.
But we have always been technicians. Sometimes we are mere peons; nowadays some of us are very well regarded, but we are subservient to the machinery (glorious, magical machinery) that allocates resources and communicates vast flows of information faster, wider and more efficiently than the Internet itself: the market. We work for the owners and managers who deal with those markets.
So what do we do?
First: if you claim to be a technologist because it is cool and throw temper tantrums because Target does not carry Arduinos: with a hand in my heart and all the philial love in the world for you, get lost; I don't believe in you.
Second: If you resonated with the description of the empathic, ethical maker I describe above, then proselytize Evangelize. Go door to door and tell people why they should pay a premium for their desks, and cars, and tools. Evangelize.
Convince them of why they should know how their plumbing, or their cars, or their browsers, or their government, or how the markets work. Go out there and tell people that knowing these things is a lifestyle that makes you a better person (because you believe that, don't you?). If they are poor it will make them better off. If they are not poor, it will make them more complete; if they are rich (and can't be bothered to do anything manual), it will improve their character.
Also ignore every self-centered, histrionic, airheaded diva you find claiming to be one of us.
When you have created that market, your gadgets will be fixable (and more expensive, but you won't care), your cars will come with service manuals. Your blender will have spare parts available.
And you will live in a society of self-reliant, engaged, educated individuals, which will still not be ruled by technology, but will still be made better by it.
Incidentally, that craftmanship that had gone by the wayside, is actually improved by phenomenon like Ikea. E.g.Traditional furniture makers (the commercial venue of their time) depended on the broadest market appeal to survive (they always have), and they had to cut corners everywhere they could... now that they are not the mainstream producers, the (intellectual) descendants of those traditional furniture makers now make furniture for its own sake (or art, for that matter: the same forces gave rise to modernism in art).
Which is to say that Ikea makes for a better expression of furniture, or Stanley makes for a better version of handtool. Ironic.