I keep finding random structures generating in my superflat worlds in plain biomes!

I keep finding random structures generating in my superflat worlds in plain biomes! This issue has already been out before, but this issue is a different version. I haven't tested any other versions, but this is really annoying, because these random structures that don't belong generate in the way of where I want things like player-made villages. The pictures below have a preset to generate decoration and ruined portals, but I also find things desert temples and ocean ruins right next to spawn.