It doesn't matter how old Ratcliffe is because he isn't buying us.
Ineos want to buy us, and they are a private equity company with many shareholders that want a profit from everything they do. They are not all benevolent geriatric United fans, they are investors that want money, and lots of it, as much as they can get hold off. They invest by choice, for money.
If Ratcliffe was trying to buy for himself, with his own money that might, just might, not be the case, but he isn't.
edit: what
@sullydnl says