I feel like any amount of urban is too much for true isolationists.
Cities develop. More efficient and economic housing/transportation should be considered a good thing.
I hate crowds, traffic, etc. So, if I’m looking for a place to settle down, I wouldn’t do that within 100 miles of anything that is even possible to be developed in my lifetime.
If I lived on the edge of a forrest and someone wanted to level it to construct a sprawling metropolis, well then that would get me a little hot under the collar.