but this is _not_ just a distribution problem like you seem to be implying. Yes, digital solves distribution, so we are post-scarcity in that sense, but someone also needs to put in the intellectual labor to write a book in the first place. That has always been scarce. And if you don't incentivize it properly, people will have no reason to put in the effort to write books.
I assure you, writers will write books even if nobody paid them. This is not to say it's ok if they have to live under a bridge because they can't support themselves. But writers write, and for a lot of them money is not the primary motivation, just a welcome (and important) one.
Likewise, painters will paint even if nobody will buy their paintings.