It's really the only way to keep content even remotely engaging. Having ilvl 500 characters basically soloing runs that are scaled to allow fresh 80's to participate is boring, and scaling everything so high that an ilvl 500 character would be appropriate excludes most of the playerbase.

I do think this game has always struggled to provide consistent, engaging high-end content, though. This game needs some kind of treadmill like Mythic+ to make high end gear actually mean something.