I think maybe lost in the conversation/debate around holdbacks is the reality that athletes only have a certain capacity of milage and wear & tear physically and mentally. Of course there are outliers and rare freaks, but for most, I've always thought 10 years is about the limit for most training hard before the mind, body and desire breakdown, which leads to the question of at what age is it appropriate to push the pedal to the floor AND what are the implications of extending that one more year before HS?
I don't have the data at my fingertips, but it's something like only 3% of all high school wrestlers will go onto compete in College at any level, less than 1% at the D1 level. I'd be curious to know the stats around the % of athletes that start wrestling in college (top 3% in HS), but do not complete at least 4 years competing in the sport. My guess would be that number is high. College wrestling (at any level) is a grind - period. Life happens- injuries, academics, girls, social life, or just simply getting beat in the room day after day can be tough on a kid who has been a winner his whole life. Whatever your HS resume says, you enter the room as a freshman and very quickly the accomplishments that you think define you (your state title, Fargo AA, 200 wins, Prom King, etc.) don't mean a thing when day after day you are getting hammered by stronger, tougher, hungrier upper classmen who probably won't even bother to learn your name unless you can help them reach their goals. Keep in mind the Coach that's encouraging MS kids to hold back was a holdback himself, won a HS state title, but then only wrestled 2 years in college before retiring.
Perhaps a better message to the youth is around learning to love the sport, learning to love the grind but also and more importantly keep it all in balance. Use it as a tool to build resiliency, grit, toughness - which are going to come in handy in life. Wrestling can take a kid to amazing places, but chasing non existent $$ seems like a empty Pursuit.