Elijah,
Wishing your son a quick and thorough recovery. Head injuries can be tricky and scary. You bring awareness to a good topic. I won't make excuses but will offer perspective to the current circumstances and reality with this topic...
Most batting helmets sold today are sold only with the information that the helmet is NOCSAE approved and not with the specific MPH rating. Most HS baseball programs have a much more limited budget for baseball as compared to football. The incidents where a player is struck in the head ON the helmet AND still sustains a head injury are very few and far between. Usually, injury occurs when the impact is on the unprotected part of the head (cheek, eye, mouth, neck, etc.) or a glancing blow off the edge of the helmet into those parts of the head.
So, with safety and budget in mind, when the average HS coach/AD make their team helmet purchases, they feel safe in thinking that the "NOCSAE approved" stamp is the adequate legal and safety protection they need and they often don't look beyond that. Additionally, helmets tend to be left in boxes in sheds in the off season where weather deterioration causes quick breakdown of the liners, rendering them useless. Sometimes, rodents get to the liners, doing the same. So, team helmets often have to be replaced yearly. And each team needs 6-8. I applaud Pitchingfan for pushing the issue and taking the extra steps.
Again, you are totally right with your concerns... just giving the current background. I agree with you - there is more education and awareness that needs to take place and perhaps further consideration on adjustments to the safety standards.
On the flip side - Reasonable safety precautions should be in place. But, beyond that, at some point, the inherent risk has to be acknowledged and accepted in all sports. As with everything, cost does weigh into the equation. Where do you draw the line? As example, it is clear that Pitchingfan takes thoughtful extra steps with regard to safety. But does he make all his players wear heartguards? Probably not. Does he make them all wear jaw guards with their helmets? Probably not. It's never easy when it comes to "reasonable safety". There is always more you can do. How much is reasonable? How much is enough? How much is cost-prohibitive? No easy answers.