Removing as many possible steps to a craft makes it far less personal. Disconnecting the human from the end product.

I would never attend an event with an entirely generated poster becuase that tells me you didn't care enough, and that attitude is probably permeating into the rest of the event.

Similarly, back before these models existed, I'd never attend an event with an overly stuffed "marketing" feel to it. It's the same crap just with a different tool attached to it.

I'd rather attend an event with a poster made of stock clip art, but a human decided the composition, and added doodles in between because that at least gives me the impression that SOMEONE is caring about the event.

Basically, it feels detached from the actual point of an event: community.