I don't think they're ruining Pro Wrestling, I mean, without them I doubt we'd have as many storylines. Sure, the actual art of wrestling & the skills & talent might be better off.. but wrestling is also "entertainment." And while cruiserweights are highly entertaining when they do high risk after high risk.. I'm also insane for seeing a Big Show/Kane/Undertaker type go to the top rope. Cause its like "Holy crap, this is either going to be really sweet, or really bad.. but either way, i'm about to see a big man fly."
Furthermore.. I originally dispised Umaga.. because I couldn't stand 3 Minute Warning. But I've really 180'd that opinion, as Umaga deserves A LOT of credit for becoming a great "big man" wrestler. I don't even know if I'd consider him a "super heavyweight." To me, Big Daddy V, Yokozuna, Vader, Bam Bam Bigelow, Big Show, Mark Henry, Great Khali.. those are Super Heavyweights.
But even with that list. Vader & Bam Bam Bigelow were highly talented for bigger guys. Big Show wasn't your typical "Giant," same with Kevin Nash if you wanna count him.
Yokozuna was great for his size & he did what his character claimed. Big Daddy V is more talented than people give him credit for being. (think how hard it is for a guy as big as he is, to do a spin-wheel kick)
I don't have a lot of respect for guys like Great Khali, cause he has next to NO actual wrestling moves. Also, Mark Henry.. for a guy who is remembered from the Olympics.. I think Kurt Angle - true pro athlete. Then I see Mark Henry & think - "What the hell could he have done?" And yeah, I realize he was there for weight lifting.. but still.. thats kinda why W.W.E. hired him.. so to expect A LOT from those types, is basically allowing yourself to get sucked into assuming.
I'm glad Umaga, Vader & Yokozuna have been in wrestling, whether its past, or present. So its really a flip of the coin on whether its good or bad. Because some are highly talented, while others are just there because of how big they are.