In fact, I don't think there is a single professional sport where women would even finish in the top 10 when competing against male opponents.
In the same vein, most sports have recreational, amateur, professional, and masters (older people) competitions, because there are undeniable physical differences between the old and the young. It doesn't have anything to do with ageism or discrimination. I mean, I can off-the-couch trounce any octogenarian in (probably?) any sport - pitting the two of us against one another is not really a competition, or fun, for either one of us.