No one’s going to know you’re talented if other people aren’t aware of you. And if you’re difficult to work with, people talk.

Any industry is like that. Acting is just a lot more public than most, so when problems arise it’s more likely that people notice.

As far as the “clique” stuff in dubbing goes, most actors I know will think of VAs they already know or already work well with when casting projects - those same actors are also always open to new talent. It’s not “exclusive” or anything nefarious, just kind of how people work.