Yeah, I think the larger point is like you said, the main exception to just doing what they can to please humans is "primal" instincts, which aren't something that can be changed with some basic training. It's _far_ easier for people to just be taught how not to trigger those, which very often tends to be following some simple rules.
One of my cats gets very feisty when she's playful, and she often will bite my hand somewhat hard once she gets into the "chase" mode (which sometimes can happen from her just noticing my hands move a lot when I type or something). She's extraordinarily sweet otherwise though, to the point where I can literally pick her up and hand her to people the first time she meets them, and she happily purrs and will continue to seek out their attention after they put her down, and I've continued learning in the few years since I adopted her how to avoid triggering her instincts like that (and to make sure to give her ample play time where she can direct her aggression towards toys instead of my hands). I think a lot of people would just see a cat who bites sometimes and assume she's unfriendly or mean, but she's so sweet the vast majority of the time that I know her temporary "reversion" to her primal instincts doesn't indicate any actual malice.
One of my cats gets very feisty when she's playful, and she often will bite my hand somewhat hard once she gets into the "chase" mode (which sometimes can happen from her just noticing my hands move a lot when I type or something). She's extraordinarily sweet otherwise though, to the point where I can literally pick her up and hand her to people the first time she meets them, and she happily purrs and will continue to seek out their attention after they put her down, and I've continued learning in the few years since I adopted her how to avoid triggering her instincts like that (and to make sure to give her ample play time where she can direct her aggression towards toys instead of my hands). I think a lot of people would just see a cat who bites sometimes and assume she's unfriendly or mean, but she's so sweet the vast majority of the time that I know her temporary "reversion" to her primal instincts doesn't indicate any actual malice.