A coach's job at those meetings is to gather all the information he/she can that it vital to helping their player's chances of making the All Region squad. How is it fair to that coach that they must equally support another team's player.
What if only two coaches showed up? Do they have every player on every team at every position memorized? Do they have nothing better to do than continuously watch and evaluate other team's players during the middle of the game?
Shame on no one but the representing coach. I don't blame my neighbor when I forget to take out my trash, and I sure wouldn't blame other coaches when I forget to take care of my own players.