API prices are paid by companies getting tens of millions of dollars of value.
In normal life money is the key constraint; buy this don't buy that etc. - whereas in VC funded companies the constraint is time. If you as a founder get funding and don't spend it fast enough you put yourself at serious risk of being replaced.
When enough of the world operates on that principle it creates a highly price insensitive market and that then can support a ton of ideas and experiments, some of which turn out to be really really good. It's a wild way to do innovation but it's been working well for decades.