I'll be in minority but my wife's Aunty had depression and it was ordinary to watch.
Dunno what the answer is, quitting seems a bit excessive. Depression linked to losing loved ones or having some serious life change I understand. I don't understand how depression creeps into a highly paid person who is playing the sport they have grown up loving since they could walk.
Instead of depressant tablets maybe a walk around poverty stricken commission housing and maybe a light switch will turn on that elite sportsman lives whilst challenging is a pretty damn good life.