I think some people just naturally jump bigger than others because they have more muscles in their legs. I don't think bigger jumpers should get more GOE just because they are bigger. These skaters don't necessarily spend more effort or put in more practice than smaller jumpers because they are actually gifted with the explosive power. Skaters who jump smaller also have to put in the effort to jump with added difficulty like arm variations, preceding steps/transitions and back-loading. I would give similar GOE to skaters who can land big jumps well without any additional difficulty features (it's harder to land bigger jumps than smaller jumps) and skaters who jump smaller with additional difficulty features. IMO, only skaters who can land big jumps with with additional difficulty features deserve to get higher GOE than skaters who jump smaller with additional difficulty features. So unless Kaetlyn also jumps like evgenia (i.e. with tanos, preceding steps, backloading), I don't think her jumps should be rewarded more than Evgenia's just because her jumps are bigger.
Have to utterly disagree.
Jumping strength isn't just a matter of muscle mass. Twitch and technique are so much of it.
While twitch may be in part a gift, so are many other advantages of elite skaters.

Really it's about the training, and the risks skaters are willing to take in bringing bigger jumps into the competitive environment.
It's also not just a matter of height. Alaine Chartrand is all of 5'1 / 155 cm and has some of the greatest speed, height and distance on her jumps of any. There was a reason she was trying to put the 3A into her FS last year. Her jumps have more in common with Mikhail Kolyada's than most women's, and they face the same control and consistency challenges that come from big clear spiky jumps. Gabby Daleman is also 5'1 /155 cm, also has enormous jumps, and is the first woman to receive across the board 3 GOE on her 3T-3T. Evgenia at about 5'2 /157 cm is 2 cm taller than both Alaine and Gabby. [Kaetlyn Osmond is about 5'5 / 165 cm.]
Or are you meaning visible muscles in female skaters legs and considering them a negative. Not sure that Evgenia's leg muscles will be visibly any smaller than Kaetlyn, Gabby, or Alaine's when she reaches 19 or 20 years old. But it seems to be evident that the Eteri technique, which relies on upper body rotation, is not as successful in mature female bodies.
What many of us would like to see, both for female skaters like Kaetlyn, Gabby and Alaine, or male skaters such as the up and coming young Russians, including Mikhail, is that the IJS reward them for taking the risk of bringing higher quality jumps that take longer to become consistent in competition.
We'd also like to see the ISU insisting on higher quality ice conditions so that the big jumpers aren't having to take hard falls or shorten their preparations to avoid bad patches. No one enjoys splatfests whether in ladies or men's competitions, and the time for denial that ice quality is a factor is done in my view.
I'd like to note that, ironically, Russian method ballet coaches know how to train springy jumps as they do this for male ballet dancers. I know of skaters, male and female, who work specifically with Russian method ballet instructors to get height in jumps along with the other advantages of ballet training.
Another way that skaters are training in jump height is on the trampoline. [It's also a way to train the higher revolution jumps off-ice safely.] If you've watched Olympic level trampoline events, you will know that the best trampoline gymnasts are not tall. 2 time OGM winner Rosie Mcclelland is 157 cm ....or the same height as Evgenia.