Clearly the balls are different. Also the very nature of football these days must mean less heading?
You hardly ever see headed goals other than off setplays. No fecker crosses it anymore. The worst cases appear to be ex players in later life who played many years ago. I also shudder to think how many played on with head injuries during games. That doesn't happen now. No Mick Harfords smashing into a CB.
It clearly shouldn't be ignored and needs looking in too. That said some talk today about banning heading all together. I mean imagine football played below shoulder hight
All sports and all 'normal' jobs have risks. We just have to reduce or make them better.
I mean if a footballer can't head then we may as well bin Boxing and MMA etc.