So women are weaker, doesn't mean its more dangerous because they fight other women. if anything its safer than men doing it because women, being slightly weaker will do less damage to each other!
And if they do fight men in the same weight class or whatever, if they can get through the qualifiers they have pretty much proven they are as strong as the men they are competing against...
But of course, its not 'attractive'. Women only exist to be attractive, they can't possible be allowed to do something that isn't!