> They can use the extra credit to buy more assets like houses, or even take personal loans to 'yolo' into crypto to $TSLA.
I'd agree that this is the case and argue that it is what has been happening since the aftermath of the ~2008 GFC. I'd further argue that this is one of the chief drivers of inequality as it drives up the price of housing for everyone without driving up everyone's ability to pay for housing by the same degree. To my eye, that is an adverse consequence. That it also drives up stock prices is mainly of interest to the relative few in the economy who own stocks. That an increasing share of flat-ish income is spent on housing rather than on, e.g., food, is an adverse effect of the strategy.
You're moving the goalposts to raise supply shock scarcity rather than something inherent to money for everyone rather than money for the already monied. I do agree that supply shocks are probably a factor these days. That said, there's only so much a given population is able to consume and making sure that they all have an equal chance at it seems more pertinent to maintaining stability than increasing the price of assets, where there is no inherent limit.