So here's the question:
Does a person reading a comment destroy the incentive for the author to post it? No. In fact, it is the only thing that produces the incentive for someone to post. People post here when they want that thing to be read by someone else.
Does a model sucking up all the artistic output of the last 400 years and using that to produce an image generator model destroy the incentive of producing and sharing said artistic output? Yes. At least, that is the goal of such a model -- to become so good it is competitive with human artists.
Of course you have plenty of people positioned benefit from this incentive-destruction claiming it does no such thing. I personally tend to put more credence in the words of people who have historically actually been incentivized by said incentives (i.e. artists) who generally seem to perceive this as destructive to their desire to create and share their work.
