To be fair if he'd taken good care of himself he wouldn't have started declining age 27-28 and he'd be far closer to his peak now at 32 than he is. Let's be honest, he's a shadow of his former self, but his former self was so good that he's still easily good enough for our team.
This is a man who let himself be filmed getting knocked out cold boxing a mate in a fucking kitchen. That's not taking care of yourself, and idiotic on multiple levels.
I agree there is a magnification of his stupidity and lack of care for his own health for all the reasons people have outlined - his fame, being a poor scouser etc.
But at the same time there's rarely smoke without fire and Wayne has set off a fair few fires in his time.