As Molly says, poison ivy does have benefits to wildlife, berries in fall and possibly other attributes. It's the kind of plant that is opportunistic, meaning it moves into spaces where it doesn't have much competition. It also likes the sun more than shade.
There's not a ton of poison ivy along the road, although I know a few areas where it has spread. We don't routinely target it in our cleanups, though. It's just not as aggressive as some other plants.
I don't remove it on my own property unless it's in an area where I'm going to be running into it. Like Molly and Erin, I'm sensitive to it.
Unlike a lot of other plants, once you pull poison ivy out by the roots it is gone and stays gone.
When I do pull it, I make it the last act of the day and immediately come in and shower, using alcohol to wipe arms, hands, face. That will cut the oil that causes the rash. Gloves and gardening clothes go immediately into the wash.
If you have animals, know that they can carry the oils on their fur.
One last tip, Virginia creeper is often mistaken for poison ivy. It's another vining plant with similarly shaped leaves, and some young leaf clusters seem to at first have only three leaves. Both Virginia creeper and poison ivy can vine along the ground or choose to climb trees. (neither is a threat to trees like wintercreeper is.)
This is Virginia creeper, five evenly serrated leaves originating from a central point. It's green in summer but can be bright red in fall.
This is poison ivy. Leaves of three, let them be. But you will notice some leaves are scalloped and some are not.
In spring, it starts out red before the leaves mature. That's when you will really see the oil shine on the leaves.

So my suggestion would be to pull the poison ivy if it's in an inconvenient area, but plant other things.... even Virginia creeper, which would like the same habitat.
Using an herbicide has mixed results. The oils help protect the leaf from absorbing the killer. Better to pull and bathe immediately.