I thought naming the panel "male stars of fantasy" was one of two things. Either it was a rather lame ironic joke, poking fun; well, trying to poke fun, at current zeitgeist of "wokeness" or SJW concerns; or, it could have been due to availability and scheduling constraints of guest authors, that DragonCon organizers realized that any really well known female authors who were invited to appear, simply wouldn't be available at that day and time.
I looked at the DragonCon website last weekend and saw that Patricia Briggs was a guest author and that Mercedes Lackey had to cancel her appearance. (I didn't memorize the guest list. Those are two authors whose work I know, so I noticed their names.) Assume for a moment those were the only really well known female fantasy writers who were expected to be at DragonCon this year and Patricia Briggs was set to do a different panel at the same time. In that case you have to call your panel something, so without really thinking about how it might be perceived, the title "male stars of fantasy" sounded like an accurate description of the panel and nothing more.