Its unfair on the everyone to face him. Theyd be worried about tackling him. If something happens , they might get blamed. He should just chill now, and enjoy watching the sport, maybe coaching.
Daley Blind plays still...... What's the difference?
I don't think it's the wisest thing from his perspective (put your family first.... rich enough; time for something new) but if he insists on playing again, it's just a case of finding a league that will accept a player with his issues and a club that's of an appropriate level.....
TBH, I think most EPL clubs apart from the obvious big clubs would bite your arm off as long as any liabilities were ironed out in advance.