Uh, no. The problem with soccer specifically - at least for girls GDA - is not merely that they train 4x a week. Of course, exercising 4x a week is good for kids in general. However, it is the fact that they train at one sport only 4x a week for 10 months a year that presents one of a combination of factors unique to GDA that makes the injury risk so high and unacceptable. First, GDA's all consuming time commitment forces kids to specialize in one sport, and I suspect even the most hardened GDA sycophants will at least acknowledge that specializing in one sport results in an increased injury risk. This is compounded by the fact that these kids are specializing in the one sport with by far the highest knee injury risk. Unlike dance, soccer involves the type of repeated and non-choreographed start, stop, turn hard and other awkward movements that are most likely to result in catastrophic knee injuries. Second, part of problem with GDA is that the trainings that USSF expects from the clubs compounds those injury risks over time. If you spend a lot of time at GDA practices for top clubs, you'll see a tremendous focus on activities that help develop first touches, skill with the ball, and other activity that is really helpful for developing great soccer skills but do not really focus on hard core fitness. Hardly ever will you see kids walking out of a GDA practice gassed. So you have all these kids who are "elite" athletes, but not incredibly fit ones, that USSF then expects to go out and play 90 straight minutes as if they were professional athletes who can spend 10 hours a week or more on strength and conditioning training. And, as I have said many times before and supported with medical studies much to the chagrin of the GDA mafia, making kids play 90 straight minutes is borderline child abuse, especially when they aren't in incredible physical condition. There is no other sport or even soccer league in the U.S. that expects teenage girls to play 45 straight minutes with only one short break, followed by another 45 straight minutes. No time outs. No quarters. No substitutions for most of the players. Just go out and do what you're told until you get hurt. Seriously, the last 5 minutes of the first half and the last 10 minutes of GDA games are universally awful and cringeworthy due to the lack of fitness and the dangerous s**t that happens when the players are fatigued like that. There is literally no legitimate reason to have a rule that requires 6 kids a game to play 90 straight minutes. None.
As for your comment about advice applying only to "the median" kids and that "elite" athletes are different, that's just nonsense. As I have mentioned before, 6 of the dozen or so most accomplished U17s during the last WC cycle (all GDA players) tore their ACLs. That's 50% of the most elite of the elite youth soccer players in the United States down with torn ACLs in less than a year. The more "elite" you are as a GDA soccer player, the more likely you're next.