Games not scaled for you play all the content, not entirely the same complaint.
If you did all the content you would probably be max at everything by the time you finish a playthrough unless you lose lots of souls. Would there be an enemy or boss that would be significant hurdle for content to be fun at that point? Or would you intentionally need to do stuff to make it fun.
Because of the diminishing returns you would actually also hit that point far earlier than max level as well.