True. But an organizer who doesn't care, will also not be willing to pay for good artwork. AI haters should put money where their mouths are and fund human top artwork.
You're really overestimating how many people can draw something "decent" in Inkscape. Most likely they will take a template. That's not necessarily better than AI either.
I don't claim to be an artist and a template is still done with the caring eye of a professional. It's way better than an AI generated poster. Or at the very least, there's many less instances where I've seen overly used templates than I have badly designed AI generated designs.