Simple fact tho is that the audience don't care.
For them a comic isn't a piece of art to be studied or admired. It's a passing distraction while they're on the toilet or bus. Something they scroll through at breakneck speed. And if an AI delivers that distraction as well or better than you or me, they'll roll with it.
Since writing for popular media is as formulaic as can be (have you seen a Marvel movie?), and the public has shown a great willingness to throw huge piles of money at formulaic, AI generated scripts won't matter either once the hiccups are coded out.
And they've been conditioned to not pay for content, so we're not surviving that way.
Plus every company's goal is to make all of the money on the planet regardless of how they do it. Naver Webtoon, for example, is pretty naked in its exploitation of its content creators and you can be guaranteed that once Robot Artist can pump out its own version of All Of Us Are Dead to sell to Netflix, their flesh and blood creators will be shown the door. A harddrive on a shelf in Seoul will be far more profitable for them than Joo Dong-geun.
tl;dr- You're right to be worried about replacement because we all will be ASAP. And we'll be the only ones shedding a tear over it cuz "capitalism".