Yeah I’m arguing with a friend who never played football about this right now. I don’t think you need to have played to have options on things but there is a culture in football about playing through things you learn as soon as you start playing with pads.
The only way to diagnose a concussion on the spot, unless the dude is knocked out cold or not moving, is for the player to tell the doctor he has one. Football players don’t do that. It doesn’t matter what level it is, the coaches or whoever else have a duty to protect the players from putting themselves in danger.