This part of the discussion is mainly about economics, not expression.
The parent argument was that AI will force artists to spend more time engaging in non-artistic pursuits because the amount of money the market will pay for artwork will go down. The counterpoint is that the amount of time the artist needs to spend on creating artwork is also reduced. In other words, if the market value for creating one artwork goes down by 50%, but the amount of time it takes also goes down by 50%, then there is no change except that the artist gets to double the amount of work they produce for the same amount of time.
Regarding the natural human desire to create art, unless you’re famous, making money as a creative involves mostly shitwork. Most commercial projects are just not very fun or interesting. Tools like generative AI can help to automate away a lot of the shitwork, so when the really interesting projects come along, they can be given more energy. This, to me, also seems like a win.
This will benefit people who spam garbage 100x more than it will benefit the natural human desire to create art.