I get your concern, but it's just about being responsible and paying attention to what you're doing. We have two cats that live happily with 4 snakes, 3 geckos, a mean conure, and a ton of fish. If you're taking the same precautions that you take without a cat in the house, then having a cat isn't going to hurt anything.
Not suggesting anyone get a cat, they're terrible people and super shady. Ours owe me $30 that they got from me while they were running a pyramid scheme.