Actually I went to UCA cheer camp, and our jumps classes were a really good workout. They were up to 2 hours of just practicing jumps on a hardwood floor, so I could see where something like that would be hard if it was anything similar. We did toe touches, hurkies, hurdlers, pike jumps, and double 9s. It was a pretty challenging and demanding thing to do, but it was worth it because I ended up All-American because of my jumps. So don't be so quick to judge; if they worked on toe touches for any extended period of time, it really may have been tiring.
I know that there are a lot of cheerleaders that do really hard stuff and work really hard, but I've watched the cheerleaders at my school practice and what they do isn't that hard. They just complain a lot and they don't ever do any sort of conditioning or anything.