Funny, my first thought was what 5 star player in their right mind would risk a career ending injury playing in a high school super league?
As long as he can maintain his eligibility for college opportunities (playing and NIL$$$), what's really the difference playing for a Super League versus a powerhouse program?
I'd argue that playing at the highest levels in GA/FL/CA/TX/LA/OH/PA...states that put out the most football talent, big programs aren't too far off from playing in Super Leagues. Look at schools like IMG Academy FL, Buford GA, Mater Dei CA, Westlake TX, St Thomas Aquinas, etc who all bring in players from all over the country and in their state who play partial national schedules, or in the case of IMG, cherry pick top competition to play against. If kids are going to top programs in their state to play for free (*wink wink*), why not get paid for it?
Injuries will always happen. My friend coached at a GA HS with three 5 star recruits. One of them was a RB that committed to Oregon, and was the brother of a GT QB. That 5 star RB was in kickoff coverage (KICKOFF COVERAGE!!) when he tore his ACL the very first game of his SR season. His career was never the same and ended staying at Oregon for only a few years.
It's possible these Super Leagues put together a catastrophic injury insurance package that deals with those kinds of injuries. Who knows what they have in store for players, but I don't think the risk is any different than playing for a HS team.