To toss you a bone, it's true that many dense areas in the US don't feel really safe.

But it doesn't have to be like this. It's very possible to build dense living spaces that are nice to live in.

But more to the point, you are free to live in the middle of nowhere if you want to. If you don't want to live in a dense area, the vast majority of residential areas in the US cater directly to you. Personally, I'd like to live in an actual city, and I'd like to pay less than $5000/month for a decent 1 bedroom apartment.