I am not saying that I KNOW that they will be injured. I am looking at the past and saying that the probability of all three of them being successful in seniors is not high. Look at skaters from the previous quad. If the chance of survival was high, we would see Tsurskaya, Sotskova, Proklova, Sakhanovich and Medvedeva fighting among themselves for the worlds podium. Out of five it is only one fighting for the podium, 2 (Sotskova and Tsurskaya) fighting for the third Russian spot, but having no chance of getting to worlds podium, Sakhanovich struggling and Proklova out. And who is the winner? The one who didn’t even have the same success as they did - came a year late to junior level because her first year of eligibility she was seriously under average.
You keep saying how high level Scherbakova and Trusova are, but that won’t be any help if they start struggling with injuries or puberty. And your argument that seniors now need to be at higher level ... well, where are the high achieving seniors who are on a higher level? You are basing it on juniors who have never done even one competition in seniors. Nagasu has triple axel and yet it didn’t get her on the podium, Tuktamysheva has or had triple exel but was not able to keep it consistent for more than one season... how do you know what will happen with all those quads and triple axels among juniors when they hit puberty? At this stage I haven’t seen any proof that one needs more than what Medvedeva and Zagitova did at the Olympics. In theory one needs quads, but if no one in seniors has them, someone still will win the medal. So if one doesn’t need all those quads and triple axel, there is a pretty good chance that the future champion will just appear for the last season before Olympic season and then for the Olympics. It is easier to fight to get to the top than trying to stay on top for three years (which Scherbakova, Trusova and Kostornaya will have to try to do).