Earlier quoted context omitted.
> If the homeowners want to sell to developers that will build higher-density housing on their land, what's wrong with that? Generally, not all of them do, which is why redevelopment usually involves use of eminent domain.
Source on that? AFAIK eminent domain for private development is rare, the vast, vast majority of the time developers just offer enough money to convince people to sell.
[1] https://en.wikipedia.org/wiki/Kelo_v._City_of_New_London