Well, your what if has just been blown out. There are at least 2 of us that do like them.
Guns N Roses never fit the bill of "hair metal". Their album structure did not fit, they did not follow a standard blueprint. They included many different elements on later albums, taking chances that other banRAB were scared of. They didn't follow trenRAB. Listen to their demo tapes and it doesn't fit hair metal. Look at GNR Lies, doesn't fit, strays to far from hair metal. They got their start in the 80's, that is the only common ground.