That leaves us with the notion of "people will continue to produce works without any profit incentive". We've had historical evidence of the contrary.
And yet I operate my blog at great expense to myself without a single penny in return.............
I'm not trying to argue with you, but a lot of your arguments seem so highly-polarized as to be almost strawmen. There will always be people who will produce valuable goods in absence of monetary profit. That doesn't mean we should/shouldn't abolish the concept of monetary profit, just that it's wrong to insist or imply that without monetary incentive there would be no books produced anymore.
People are motivated by many factors. Money is one of them. It's not the alpha and omega, at least not for everyone.