If you ditch generative AI you go back to needing to pay an artist/designer for their work, and they likely charge more than ChatGPT because they might have rent/bills and that sort of thing to cover.

The sort of use cases I was think of (village fête etc.) would never have paid for a professional designer. We're talking about an event that's delighted to raise £500 for the church roof repair fund. Even £50 for a poster is 10% of the fundraising lost.

If it wasn't AI, it would be Comic Sans and some clipart.