For the sake of silly discussion if PPT exists and if the printing presses were real in the stock markets, is this good or bad?

I guess it depends on how you define good and bad.

Markets are based largely on emotional inertia, so a judicious use of artificial liquidity can prevent a 1929-type scenario. Or at least postpone it a bit, I would think. Kind of like pumping the brakes a few times before crashing into a brick wall.

Something thats interesting to note, during the 1929 crash, the downward plunge was stopped by some big players coming in and buying some blue-chip type stock over the asking price. So there is a historical precedent for a workable PPT-type model.