We have male skaters who can perform quads with normal training. If we develop the right female talent with proper training from the beginning, the USA can succeed. We just need to select talent from a different pool.
The way skating works in the US, we can only select talent from the pool of skaters who start training at young ages on their own initiative and stick with it at a serious level of commitment.
You can't get skaters into the sport if they don't live near ice rinks or if they can't afford to train almost every day for years.
(You can get recreational skaters from the latter group)
There is no mechanism to find youngsters who both have ideal body types as children and are likely to have ideal body types as young adults, convince them to start training, and make it financially feasible to continue at a level to reach elite levels.
They have to want it on their own, and they have to prove themselves at least partially at their own expense until they at least get close to the top.
Anything else would require huge influxes of financial support from sources that do not and never have existed in the US.
At best, there could be programs to make the training more affordable so that skaters who start on their own initiative and love it won't have to drop out just because of money reasons.
And marketing to make skating training seem cool to young girls and their parents.
What gets kids into the sport at young enough ages is usually the pretty dresses or the jumping, maybe the spinning or the music.
Or any combination of the above. Even little girls can have diverse interests.
And then they have to learn to love or at least tolerate the gliding and the speed and repetitious practice of basic skating skills as well as jumping and spinning skills and the falling and other sources of pain and frustration along the way.
Interests and focus may change as they get older. The ones who succeed will be able to develop all the skills necessary to excel at the sport.
Over the last several years the US has made several changes to the scoring at middle levels to emphasize skating skills and difficult jumps.
But first you need to get them into the rink and keep them training for several years even to get to those levels. Mostly at their parents' expense.