Mobs only spawn in appropriate biomes

I think mobs shouldn’t spawn together but spawn in specific biomes like husks and strays Creepers in the desert. Also they will be a lot greener with black thorns on their body. Meaning when they explode they get fired in all directions. Zombies. Dark forests,swamps and deserts Spiders. Caves,hills Skeletons. They spawn in temples and forts specific for skeletons Ravagers. The mountain peaks.