

Skaters have to know how to perform jumps to get to the level of competition they are at. Perhaps what you are trying to say is that some skaters like Jason Brown have more difficulty mastering the extra quad revolution. That does not mean Jason doesn't know how to perform all of the basic jumps. The extra quad revolution is not technically a jump, it's an extra revolution added to a basic jump, i.e., toe loop, salchow, flip, loop, lutz, axel.
There are skaters at lower levels who do have trouble technically with certain basic jumps, and thus end up not being able to master triple revolutions for certain jumps, which means they usually don't advance to higher levels of the sport. Usually most skaters who make it to seniors can master most basic jumps at triple revolution, although 3-axels can be difficult for some of the best skaters, e.g., Patrick Chan and Stephane Lambiel. It took Jason Brown awhile to master the 3-axel revolution, but he did. Jason is also able to land quad revolutions. He has just had difficulty mastering quad revolutions consistently enough to be comfortable with them in competitions. But that's why he's made the coaching change. Having difficulty mastering the quad revolution does not mean someone of Jason's caliber can't 'perform the jumps.' Jason is technically a superior jumper. Quad revolutions are difficult for every skater, even for those who have been able to land them in competition with a degree of consistency.
Yuzu Hanyu and Javi Fernandez wowed us with suspended quads, gorgeous when they are in the zone. Then Boyang Jin and Nathan Chen came along and showed it was possible to speed up the quad revolution (in more ways than one).
IMO, your stance is incorrect. As other posters have pointed out, the ISU is not trying to assist anyone who can't perform quad revols. They are, hamhandedly perhaps, attempting to make changes that might help balance programs, by rewarding clean jumps over rewarding poorly executed jumps and jumps with falls. It's still going to be important for men skaters to land quad revols in order to reach major competition podiums. That necessity is not going to change.
We'll have to see how the new rules pan out before making definitive judgments and OTT assessments. IMO, your over-generalized view that slams high level skaters as incapable of performing jumps is off-base. Yes, it's harder for many skaters to consistently perform quad revols, or everyone would be landing them all the time. Keep in mind that it's also hard for some skaters to perform triple revols. But since triple revols have been the standard, such skaters don't make it to seniors without at least the ability to land most triples. It's also hard for some skaters to master skating skills, or perfect spins, or interpret music well, or perform difficult transitions. Few skaters can skate with the superb attention to detail and charisma that Jason Brown possesses.
The thing about quad revols is that it's still a journey in progress. The sport is not going to suddenly require that everyone land 3 to 4 jumps in a fp with quad revols, or that every basic jump has to be mastered at the quad level in order to reach the podium. We may be fast reaching that point, but we haven't yet. The ISU now realizes the efficacy of advancing to that point with judicious caution, in terms of how much value is given to specific jump revolutions, and in terms of GOE on jump landings.