Did you not read, or understand, the context?

If their patrons withdrew support, they wouldn't have "easy patreon money".
They wouldn't have any money, hence they would need to get jobs to provide for their family which, in turn, would mean less time available for development.
So the post that he replied to, suggesting that if everyone withdrew their support, then the devs would suddenly produce an update, he's pointing out that it doesn't necessarily work out that way.
In fact, it can quite feasibly have the opposite effect.