It is physically impossible to see all the kids playing high school baseball. An area scout has a large territory in most cases and there are simply too many teams in a short season in order to see all the kids. Especially those that just didn't want to play in the summer.
The main value in high school baseball is it gives scouts a chance to see all the players that have been identified. Sometimes this process ends up identifying someone not on their follow list. So new talent is discovered at times through this process. Some scouts will hold Tryouts. Some will receive information from bird dogs and other contacts they trust. But no scout is capable of seeing every high school and dollege player In their territory. Furthermore, even if they could see everyone, they would not take the time to evaluate each player. They are looking for professional prospects! They schedule their travel in order to get the most done and see the key players as often as possible. In fact sometimes an area supervisor will see most every game a certain higher profile prospect plays. So if he is at that players games, he is missing all the others that day Unless there happen to be two games close together on the someday.
Most states play their HS schedule on certain days. I can't remember right now, but Texas was a pain to go into and scout. They used to play all their games on something like Tuesday and Friday, not sure if those were the days. So if a kid you wanted to see played on Tuesday, the next scheduled game was Friday. That makes it even tougher. It's no wonder that kids sometimes get missed in Texas.
I can go to one or two places in the summer and see the top few players from nearly every state. Just imagine how difficult that would be during the HS season. So the top guys get identified and then followed by the area scouts. The regional and National Crosscheckers and then Scouting Director are unbelievably busy during the spring season. In most every case, they are flying all over the country checking on players that have already been identified before the season even started.
None of this makes HS baseball less important. If it weren't important these people wouldn't be spending a fortune flying around the country to see HS players. I think what it says, and this is only from a scouting/recruiting standpoint, the summer and fall plays a much larger role in being identified. As far as finding talent that hasn't yet been identified, that is our niche. We try to gather as much information as possible during the HS season. I'd like to think that is relevant by itself.
JP, I think what that scout told you is true, but he should have added the spring is mostly about following a list and keeping your eyes and ears open. Did a scout really say "Maybe the kid doesn't want to play". It would take some extra special talent for me to want to travel somewhere to see that kid.