That's not completely true. There are some species that have adapted well to human domination. To give a trivial example: there are bacteria that only live in human bodies. They wouldn't do well if there weren't so many humans. :)

Pet species like dogs and cats are other trivial examples.

But there are larger non-pet species that have adapted to live in an environment dominated by humans. Rats are one such example.

Yes: I'm being pedantic. Your point still stands.