We know. It's good at making stuff up. It's bad at facts or for generating things that withstand scrutiny.
This will not produce superior work to someone who knows what they're doing at the controls. A competent programmer doesn't need this. An excellent touch typist doesn't need this. But let's say someone who has a vague idea of what outcome they want, but an incomplete understanding of the mechanisms to get there, can get further with a do-what-I-mean UI.
One of the keys there will be providing a way to nail down the parts that are correct, hold them constant somehow, and "in-paint" the bits that are wrong. For images, we have this figured out, but for larger works, we'll have to think through the equivalents.
Using AI to automate things to rescue a failing product idea is kind of treating AI as a tool. But AI won't fix a bad product idea.