I’m not interpreting you as believing it’s an “absolute truth” I’m saying it doesn’t seem like it would bear any relationship whatsoever. You are still saying that as a rule of thumb dog-lovers are less likely to respect people’s (lack of) consent than cat-lovers. That’s insane.
Let’s be real about it: being a cat or dog person can tell you something about a person’s personality and hence give you a hint about whether you’ll get on with them. A green flag should first of all be universal, not dependent on the person considering it, and second it should actually be a reasonably accurate indicator.