That is simply not true. The government may print arbitrarily much money, but due to inflation that will not necessarily fund everything. Who would accept worthless money in exchange for services?
But that still begs the question of "would printing money for hospitals produce enough liquidity to cause runaway inflation (almost certainly not)?" and "why fund this and not that?" and "why do we collect taxes instead of letting inflation do the exact same thing?" or even "so what stops the government from using price controls to fight inflation instead of just austerity?"
There are answers to these questions, but without TPOASIWID these questions never even get asked.
When I see somebody say that phrase, I assume they have no interest in learning more about the system as they already have the only answer they ever need.
Is that what you're seeing from my comments? I think I've shown you that this heuristic can be useful for raising further questions!
When I see people not using this heuristic I see people fall for lies.