Earlier quoted context omitted.
Printing money has not had much impact on consumer prices. But it seems very plausible that it is causing inflation of asset prices, including equities, and that that is a distortion of the market that could have negative long-run repercussions.
Exactly this. The FED and the ECB have been printing money like crazy for years, however this money did not go to the man in the street but to banks and indirectly to other financial institutions. And those don't spend their money in the grocery store but in the stock market. The classic economical laws are not broken, they are still in full effect and we see their effect in the inflated share prices.
Meh, most of what they are buying is just our own governments debt [0]. Now, you can certainly argue investors are buying more equities now that there aren't as many treasury securities to buy, but equity returns aren't even abnormal from historical returns. Inflation adjusted Annualized S&P 500 Returns with Dividends Reinvested for the past 15 years are 6.738% versus 7.690% for the 15 years before that [1].
[0]: https://www.federalreserve.gov/releases/h41/current/h41.htm