This is a great topic. There are good points all the way around. For most the bottom line is not many coaches have the time to dedicate every weekend to wrestling for 8 to 10 months out of the year, run practices throughout the week, go to camps, and travel to Florida for Disney duals. The ones that do I am not sure where these coaches found their wives, or find time for their own kids, or if they even have wives and kids. That is why most need coaches at all levels in a program which is extremely difficult to find. We all can't be Carroll and have 20 coaches with Hall of Fame coaches moving into the district for fun. I will agree with Joe it is better for coaches to be teachers. "Only" because their schedules match up, they can cherry pick kids that they have built relationships with, and they can keep a finger on the kids while they are at school. With that said I know an absolute ton of lay coaches that are incredible.
I am also a fan of the youth coach being involved with the athlete all the way through the program. It helps with retention and I think overall it is great for the program. I also believe the head coach of the High School is the head of the program and if he doesn't agree or get along with the youth program coach than the youth coach needs to go, unfortunately, if either coach plans on being there long term.
If the head coach of the High School doesn't agree with the coach giving private lessons or the Academy his wrestler wants to go to that is a major issue and one that can be difficult. If they don't agree with each other do you think they are going coach the same technique? Or speak highly of what each coach is doing? The answer is no and then you start inserting doubt into the wrestler about what they should be doing and that is a cancer for the kid and the program. Hence the problem that can arise from wrestlers getting coached outside the room. Don't get me wrong I am a huge fan of it and I think it is necessary but during season not so much unless the head coach is on the same page as the Club or Academy coach. I get the fact as a parent you may not like your coach or agree with the way they coach and you are looking elsewhere for help but many times it only makes it worse. I also get that not all High School coaches are created equal.
On to the over training issues. I have seen this so many times over the last 20 something years. A kid trains all of season and summer and doesn't take any time off and at the beginning of season is destroying everyone one and then come tournament time things don't look so good for him. You take any sport, even ones that are much less taxing, and look at what it takes to peak at the right time you will see there is always downtime in that equation. The goal of the High School coach should be to peak at that right time and the other coaches may not be aware of this goal or the schedule that has been put in place.