Earlier quoted context omitted.
What do you think those sellers on the secondary markets do with the money they get? At the end of the investing chain it’s always jobs, products and services - or bank deposits. Any money not physically hidden in a cash vault or under a mattress takes part in the economy.
Re-invest in crypto or other, already-existing stocks. The secondary market is so huge nowadays, and uncorrelated from dividends, mainly because growth (followed by regular buybacks), not dividends, is now the main way to pay investors, but not only. In fact, what Jacques Richard call "futuristic accounting" (his research is available in english [0]) is basically helping big companies to decorrelate real profits from…
Again, for a stock to be on the market, somebody has to do the economic activity to create & bring it there. Buying from that "someone" pumps the money back in the economy. Buying from another, previous, stocks owner just moves the situation to him.
Kind of like when you pay your retailer for the product on the shelf: there are certain delays but eventually the money has to reach the product builder, with each participant in the production & logistics chain keeping his share on the way.
This is simple, trivial logic and no amount of biased, ideological "research" can change it.