Interesting to revisit this, and quite admire Brucie's hearty defence of his unpopular stance.
Ultimately though, isn't the idea behind "football" being that you can literally use any part of the body other than our arms/hands that we most commonly use for everything in normal life. That's kinda the point of it, isn't it? Everyone can sorta understand the attraction behind that because we use our arms and hands to do literally everything off the football pitch.
So the idea that you then also ban heading kinda changes the fabric of not just football as a professional sport, but as a hobby or pasttime activity. You're now changing the fundamental premise on which football/soccer was built upon.
I agree that that if the research all says that footballers are 5 times more likely to suffer from dementia then much more should to be done, including both head protection and proactively monitoring.
Playing devils advocate, I do also wonder if most of the damage is caused by winning headers from goal kicks, rather than from getting onto the end of crosses, and what that could mean if anything does develop further in this area.