As For Former Rugby (& Football) Players Now 'Presenting' Here, There 'N Seemingly Everywhere With Signs/ Symptoms of Early Onset Dementia... Evidently As A Long-Term Consequence of 'Sub-Concussive' Injuries Sustained Over the Decades Whilst Engaged in Said 'Sport' - One I've Ever & Anon Heartily Detested & Loathed: Far As I'm Concerned, Speaking From My (Armchair Critical) Perspective As A Sports-Hating, Rugby-Detesting 'Wimp'/Nerd (From My Own High School Years), You'd Have Had To Have Been (Partially/Completely) Brain Dead NOT TO HAVE REALIZED That Seriously Flirting With New Zealand's *One-Time National Religion Would Ultimately Bring You Unstuck, & Lead to the Sort of Stuff Now Being Witnessed Around the World...

Technically (i.e. strictly) speaking: rugby, racing & beer.

Postscript (Necessary Disclaimer):

But as for former (now permanently incapacitated) rugby stars/players now rather belatedly seeking to sue/bring class actions against their former teams/coaches etc etc etc...

I see it a lot like former smokers doing the same...

Hey, folks, it's called opening one's eyes a tad and seeing the roses...elsewise known as taking a modicum of 'personal responsibility': i.e. you'd have had to have been living in ye proverbial cave/under a rock NOT TO HAVE KNOWN/been aware that the stuff has ever been seriously problematic...