Having poor taste (or more charitably, having no taste) can be covered up or ignored by the ability to choose from a pre-curated tasteful menu of options. This is what happens when people who "hate shopping" pick a mainstream clothing brand and stick with it. Or pick a car (most of them). Or a frying pan. I've never seen an offensively ugly frying pan. You could pick one out blindfolded and end up OK 100% of the time.
But when you put a tool like generative AI into this person's hands, they are exposed. The palette of possibilities is open. The curation is on you. And if someone with taste isn't in the mix, it will ultimately become apparent when you share your creation with the world.