Not sure why this is downvoted. Space is really, really big (the name fits!). The biggest Earth-orbiting satellites are a bit less than the size of a school bus (the biggest being something like KH-9 size) in terms of mass, somewhat bigger when it comes to things like parabolic dishes.

We worry about orbital debris because of the consequence of loss. There's a lot of room up there (not discounting everyone's concern).