Well for starters you can't use this bacteria and all bacteria interchangeably.

Secondly bacteria of all sorts live in different eco systems. But all bacteria doesn't live in every eco system. They're not subject to the same stresses, attacks, and naturally don't develop immunity to things they're not exposed to and all bacteria aren't always exposed to everything...

You're kind of going all or nothing for millions of species of bacteria and that's obviously overly simplistic. You might as well make the argument that because cheetahs can run 60mph, so shouldn't all vertebrates be capable of that?