I said what they were doing in the part you quoted. By dominating a field, they establish ample precedent that others like them can do so as well. This is not a

I said what they were doing in the part you quoted. By dominating a field, they establish ample precedent that others like them can do so as well. This is not an intentional thing that they're doing. It's a byproduct. This phenomenon occurs all the time, for groups of all kinds. To flip it around, think about nurses before male nurses became commonplace. What would run through your head, thinking about being a nurse? There are probably a lot of things that would stop you from taking the idea seriously, just because the profession was dominated by women and had hardly any men.