Could be. But there is the crux: A language should guide the programmers to good use of the possibilities of that language. If it does not, what worth are they?

Could be. But there is the crux: A language should guide the programmers to good use of the possibilities of that language. If it does not, what worth are they? You also must define "idiomatic Python" or "idiomatic C#" first. I would recommend, that you first write your post and than commence with the discussion.