You would be correct in the opinion of many of the tumbling coaches on these boards. I agree with you. However lets look at this another way:
The skills you mention are necessary currently by USASF/Varsity so they will not do anything to limit them. If you get rid of the the "wow" skills in tumbling sure USASF/Varsity may argue injury reduction but I doubt it is the main motivation. It is a side benefit to whatever the main motivator truly is. These are the skills that were typically done by the male tumbling specialists who often are not the best body types for the stunting that USASF/Varsity wants to see on the floor. You have to have been reading Varsity's pages for years on How to get Boys into Cheer to understand where I am coming from. They have never advocated for the flashy tumbling. Stunting has always been the main thing to do and to get boys for.
Lately more females have been doing these skills as well which now has USASF/Varsity concerned that there is just too much daggone emphasis on tumbling and not enough on stunting. Again IMO injuries is the red herring they are using to push whatever their real agenda may be. Still haven't seen those statistics that prove that this was needed. They have been slowly but surely pushing the rules towards limiting tumbling. This was just the latest push IMO. Especially since most of these tumbling passes you can not use in college. If you get rid of those skills, you now reduce the both scoresheet and perceptive need to put that street tumbler, parkour specialist, or even ex gymnast who can't stunt at all on your team. You no longer need his flash to compete against another team because they don't need it either. Currently it is a choice in how you choose to hit the scoresheet. Since we as an industry have not made the choice to limit tumbling (even the small gym coaches argument is a red herring) they will make us limit it.
This is JMO but I have always felt that USASF/Varsity's goal was to basically be all things cheer from Tinys to College. Uniforms, rules, competitions, everything. You have to go by or thru them in order to compete. Period. One way or the other. If that is the case, then you can't have All Stars competing harder skills than they can in college. Currently stunting follows these progressions so college is seen as the epitome of stunting. Not so with tumbling. There is a major let down to tumblers coming out of all stars that can't do the crazy tumbling they learned while competing in college. We always hear about the athletes who say they don't need to even learn a double full because they can't use it in college. They are not going to add to the skills you can do in college, so the next logical move is to take away skills you can do in all star.
Now I could be 100 percent wrong. But I read a lot, and listen a whole lot more. So far, I have been pretty close to the mark on lot of things. Even when first denied by those in the know.:)