Ambient mobs

So we got bats but Minecraft would benefit from other ambient mobs like:

Fake hostiles:Hostile mobs are great(meh) but fake hostiles don’t target players but act as background hostile mobs to scare the player.No drops

Birds: Birds just fit if you add a non-ambient bird add an ambient bird to show a shadow of that bird they don’t drop.

Villagers:Villagers are nice but why don’t we add things to them like baby villagers can play catch while older ones can shake hands.

Fish:Make them look cleaner have bigger models and different animations

Jellyfish:Just add them they work and add tiny ones to the background to help 

Drops:Ambient mobs don’t drop stuff but the birds and jellies I mentioned do birds drop meat and feathers and jellies drop stingers

Thank you for your time Mojang