Getting rid of it also stops signaling that it's a place where women are objects, but men are not. The rate at which female attendees are treated like booth babes (i.e. "sex sells" people who know nothing of the field) at these events implies this is indeed a problem. By literally fucking over those 10 people, we might help stop fucking over a different field of work that is currently being fucked over.

It's not a clear-cut win/loss either way on the whole, sure. But there's no way you can argue that it's not a sexist practice as it exists right now. What you do with that info is always a tradeoff, and I suspect we're on different sides.