Although I am not an engineer or suchlike, over the years, I have tried, failed and succeeded at fixing many things including computers, musical instruments, electronic items and bikes. Of all these and many more, bikes are the easiest to fix and most difficult to screw up unless you are a dolt to begin with or so shit scared and invite misery wholeheartedly by treating the toolkit as your sworn enemy, If you do your research well and follow some basic thumb rules like not taking to a hammer all the time, bad threading of bolts, using the wrong tools, not measuring twice before cutting etc..
No offense meant but Rohan is just wrong on this one and I think we should stop taking the brain surgery part seriously..... Just because you "assume" it is NOT simple, it doesn't mean that we should assume that we will never be able to do it. I'm not against going to LBS in case of an emergency or for a service. But when you're 100kms away from home (and LBS), if you don't know the basics of how to fix your bike, you will have to cut short your ride and feel bad about it. Learn to fix the bike yourself and such things won't happen.
Also I'm sure LBS such as BOTS or anyone else would very much prefer you go to them for major issues than minor issues. Learn to fix the bike yourself. Let me see if I can spare some time to start sharing the knowledge I have acquired about bikes. I'll start a separate thread on that one when it happens.
Regards,
Shankar