There is an easy to define line: there is no line. It's not a boundary where "over here is good code" and "over there, not" we just don't have a good idea of where the line is. No. There is absolutely no line.
To be honest, I completely agree with you.
The point I make is that not everyone would. And that disagreement alone results in a blurry line as to what some would consider important and what others would not.
But personally, I honestly do wish more people had the same opinion as you.