This isn't a Dev decision, that's straight from Tom. And while, once in a blue moon, Tom does change his mind, it's not something anyone bets on happening and the devs know well enough not to ask unless there's a really, really, really, really good reason.
Tom doesn't want disease. None of the possible benefits qualify as really, really, really, really good, so none of the devs are going to bring it up with him, and I would suggest that doing it yourself would be a bad plan.
So, you can discuss hypotheticals if you like, but it's not going to happen short of a minor miracle.