"Urban theorist" is an even more useless title than urban planner lmao. At least urban planners want to do good, they're just ignored until they rubber-stamp pre-planmed prestige projects by the government.
There's fuck-all to theorize, what's good has been known for ages. The issue is not knowing what's good, but implementing it
I suppose, though in my personal experience it's more a question of having your soul crushed and giving up at some point. Most planners I've interacted with want to - or at least started out with wanting to - do good. It's just incredibly difficult to do anything other than MORE ROAD or BIG EXPENSIVE OFFICE.
Oh I don't even mean the broken down people, not judging by the official position or what they actually do even, I get the constraints.
But even discounting those the field is still littered with fully car brained people entirely on board with whatever next planning crime is currently being done