SBMM is the best thing it could have. Players of similar ability should be pitted against each other. That's how most every non-professional sporting event and competition works, from dog shows, to arts and craft fairs to beer judgings to restaurant critiques to adult softball. Otherwise there wouldn't be any women's sports, let them compete with the men. No special Olympics, let them compete with everyone else. No kids categories, let them compete with the adults.