The whole argument pretty much ends if you look at the reality. Take Clemson and USC and Furman and College of Charleston as examples......and look at the bios of their freshmen and sophs.
First of all, if a kid is from Texas or California or Florida or England or Canada.....its a pretty good bet that they weren't recruited out of HS play.
Secondly, for the regional kids (Carolinas, GA, TN, VA) see where they played prior to enrolling at that school. What Club team or Academy team is referenced.
If 80% or more of the kids played at the highest level (Academy or R3 on the boys side.....R3 or ECNL on the girls side) then its probably a pretty safe bet that thats where the college coaches are doing their recruiting.
D2-D3 schools and maybe even some lower level D1 schools may use HS games to assess players, but I doubt ACC or SoCon coaches are...unless there are special tournaments like Viking Cup for the girls.
