If players made bad scores on such maps, even if the maps are insanely hard they still would barely give pp. Take a look at tag4-maps in standard - they give pretty much nothing because nobody can play them, despite them being rated highest in difficulty by far.
TimmyAkmed wrote:The old system wasn't accurate but if the new one is, and if you see a taiko map with these kind of streams it would be obviously counted as map with an enormous difficulty and should give a lots of pp. So it would be the same for this map.
Maybe I see a problem where there is no but I think it's the main reason of why std diff should not count in the system.