It's very simple. If some guy wants to run and promote club baseball that directly competes with high school, then so be it. The better student/athletes will be smart and stick with HS baseball while others such as dumbell students who could care less about their grades. Of course we know where priorities should be for flunky students but that's each kids parents business to deal with. Club ball can be an option for those student/athletes who play another school sport, but are also good baseball players and club baseball could offer them a choice they wouldn't get in high school.
Club ball could find it's place if it's competing with the high school season but IMO, it would be foolish to try and lure players away from their school teams.
Bottom line is club ball during HS season should be an alternative for those who can't play HS ball for whatever reason. HS ball should be #1 for the student/athlete.
As for high school coaches dictating off-season baseball to their players, those coaches are flat out wrong. Now they can suggest that they play for a summer team but they can't be making them or threaten their status by not playing for a certain team. Maybe some players have to work a summer job and might pick up the game in the fall. As long as they stay in shape and work in the off-season program, that should be enough. Now if a high school coach wants to set conditions based on his off-seasoning conditioning reqirements at the school, that's fine. The last thing you want is a player coming into tryouts/spring scrimmage season out of shape, unprepared and ripe for injury.