Because it worked so well…
…when the Weimar Republic tried to inflate its was out of its (brutal, to be sure) reparations, the Left keeps recommending it as an economic panacea.
Look, judicious increases in the money supply are desirable and even necessary on occasion. If you’re making it the foundation of your strategy for economic growth, you might as well sacrifice a goat to Pluto, Tsai Shen, Vaiśravaṇa d/b/a Namthöse, Kumugwe, or the wealth-god of your choice. At least that won’t rob people of their savings—and it makes the goat seller a little richer.
Don’t ask impertinent questions like that jackass Adept Lu.