That doesn't mean it's a good idea to keep smacking your head.
I have had two pretty severe concussions (within a short time of each other). I still have migraines as a result. I compensate for short term memory loss by writing everything down on a calendar and have gotten very good at hiding that part of my problem. I see a great neurologist and he told me NOT to enroll my children in soccer. Neurologists see more children as a result of participating in that game. The repetitive head trauma causes a lot of issues... some short term and others long term. I actually called him when my son wanted to go out for football and he was fine with it (padding, helmets, etc). My point is that brain trauma doesn’t always just “go away”. There is a much higher chance that I may develop Parkinsons later in life. I wouldn’t wish what I have dealt with on anyone. IMHO, it is too much a risk.
head it right and it’s alright.