Well yes, there's a definitive lack of proper instruction on how to avoid getting hit flush, and probably most definitively on how to RECEIVE force with minimal damage. That's what you get for thinking. Strong neck muscles aren't as important as posture correctness. The neck is not a thing designed to be doing things other than what it does. So lifting weights with your neck is pretty silly. Mike Tyson swore by rolling his neck around in bridge position, but Mike Tyson was also born with a very thick neck and huge traps. Mike Tyson also got knocked out in almost every fight he lost. There's also something to be said for what happens to your hormones as you age. Some preliminary data has suggested that TRT helps alleviate the effects of aging on the brain, which makes a lot of sense.