I think you and Ende-whatever just hate it for the sake of hating it.
I want to do low level content with my higher level character, also, some people have no room to make a new alt or just don't want to commit the time to level all the way up just to do one of their favorite dungeons. Now, you can do all of the dungeons at any time for a slight increase in difficulty and you get some rewards for doing so.
if you don't understand the point of it then don't do it. I think most people would enjoy trying it out and if you don't. DON'T DO IT
go sprint through old content super fast and create your alts.