Spicy take. I grew up in a neighborhood that would've been considered "suburban" I guess. I had no problems because there were 20 kids who lived there and we all played together. We also went to the same schools. Never had any problem with that though the fact my family moved for work did distance us from our relatives. I was never "extremely isolated". Ever. Bullied, perhaps, but never isolated.
I think the terminally online always connected culture of today is doing far more damage. Compound that with people having less children, housing being transient due to a rental economy, etc and you have the destruction you're looking for. I don't think the implied solution here, giant multi-story multi-family housing, is the solution either. Packing people in like sardines is not effective. You only need to look at Asia to see what happens when you let this form of housing reach its natural conclusion. It sure is nice having my own 4 walls, a garage, etc. It's a space I control and I would fight to keep it. I do wish my area was more walkable. However, I will take what I can get. There's a park about 10 minutes from me and a few coffee shops.
I am simply not a fan of this anti-car, anti-natalist, anti-detatched-housing trifecta that seems to be polluting more progressive social media. I don't understand it. I don't think I ever will.