So male gymnasts are not flexible and graceful (wrong) and female ones are not strong and powerful (also wrong)?
Absolutely, there are some male gymnasts I have watched on the rings and the pommel horse, and have marveled at the grace and flexibility they display. Similarly, I have watched female gymnasts vaulting off a spring board and reveled in the power and push they have coming off the spring board and equipment. I am grateful in the sport I am interested in, and have competed in (eventing or horse trials), that women and men compete on absolutely equal terms. Yes, you can 'muscle' a horse around a cross country course, but it is actually so much easier if you can persuade the horse to work in partnership with you. And 500-700kg of horse is a lot to muscle around, whether you are a man or a woman.
I also would extend the question of whether sport is sexist, to sports reporting - watch any news program for a week, and note how often the report includes anything on women in sport. I am expecting the MRA/misogynistic lurkers to spout "But women don't play sports". What utter tosh.