katzinger There is no need to raise the pitchfork against me and start a discussion with me, when it's already been decided anyway.
As for your arguments:
Boats catch any entity, any that walks/swims closeby (they fixed squids for obvious reasons sometime ago).
Polar bears on leads make no sense to me either. You cannot tame nor breed them. They are relatively new mobs as well, so it might have been just overlooked or intentionally left in for the younger audience, due to the "cuteness factor" of bears. Llamas are also fairly new (from my view they're pretty useless for Survival; [Creative got always uses for new mobs]). They also seem more like a "fun" or "cute" addition for the younger audience to me.
One can argue that pigs, cows, chicken, are "domesticated" animals, you can breed them as a player, and they will follow you if you hold their according food item (wheat/wheat seeds/carrots). They are in the game since very long, so some sort of "inconsistencies" to newly added mobs that you argument with can happen. It's not the only area where inconsistencies in the game occur after all.
Wolves and ocelots are wild. You cannot breed them in the way that they'd maintain their species.
You can only tame them to a domesticated version (dog/cat) and henceforth breed them.
Villager Golems are either player-created or "by the village", so that seems still logical to me, as they are not "living beings" in that sense, rather a "tool", the same goes for player-created SnowMen/Snow Golems. Golems are "animated anthropomorphic beings that are magically created entirely from inanimate matter".
It does not "hurt" me the least, as a player, I just try to "emotionlessly" word what seems like "Vanilla Survival" to me and other players I talk about these topics, with no regards whether or not it is "fun" or "easier" or better for "especially the younger audience" or not. If you go by that argument, there would be plenty other things that need to be implemented or re-implemented.
Only because something facilitates the game or makes it "more fun" is not an argument to be part of Vanilla, as we also can see by what gets removed or implemented.