I used to think the same way, but I have been out with the Hummer club a few times and while there is no doubt the H2's are definitely on the heavy side, these guys put 37's on them with little else and use and abuse them as they were intended. The thing is they have the power to push themselves through just about anything and if you ever get a chance to look at them up close they are designed with off-road use in mind.
Same kind of thing with the H3's, mine is an H3T and while it does share some common traits with a Colorado such as the engine, transmission and other common parts; the transfer case, differentials, front and rear E-lockers, axles, Blisten off-road shocks... actually almost everything around the suspension has been beefed up. The frame was widened and stiffened up, the front was pushed back to expose the front tires so it could approach and climb 16" ledges... anyway I could go on but you get the picture. My truck actually sits at the same height as a Ford Super duty... it really doesn't feel anything like a Colorado.
But that is really aside from the point, a lot of people lose sight that it doesn't really matter what you drive as long as you are out having fun. I run in pretty much all circles, Jeep, Toyota, Nissan... the biggest factors I have seen that make a difference even over make or model is often lockers and a good set of tires.
A clip show of stuck vehicles is kind of a cheap shot, irregardless of make... we all get stuck eventually.