Some waterlogged blocks should be washed away by water flow

I think it could be better to split all waterlogged blocks into 2 types: 1) Bocks that can be destroyed by flowing water, but they can be placed in the water source For example, buttons, pressure plates, candles, signs (it can be replaced by gates in autofarms), moss, etc. 2) Blocks that can be placed in the water source and they are not destroying at all. For instance stairs, slabs, glass panels, gates, trapdoors, chests, etc. This way can solve the problem with rails and other stuff that implausibly stops water flow