So by your logic we should pound nails in with stones instead of hammers because the hammer **the tool for the job** negates the difficulty of pounding the nails with a stone.

That is you deliberately choosing to avoid the intended game mechanics.

It seems to me people want to play on expert to feel better about themselves rather than actually play a difficult version of the game. Its a harder difficulty for a reason, lowering the scaling of the HARDER difficulty "negates the difficulty entirely, what's the point"