lol, I wasn't thinking this would get a reaction. For the record, that statement isn't something that I will defend that hard, but here is why I feel I can argue it (a bit anyway, I will keep this as short as I can)
I have 3 boys, I've coached multiple sports at multiple levels for the past 12 years now, the most prominent and the one I have the most knowledge and data on is Hockey. You have to consider the numbers. That is, how many females actually have an interest in and partake in sports? I'll offer a small sample of data, take it for what it's worth. My 10 year old plays hockey at the highest level for his age. For this top team, they had 170 kids try out. about 12 of those were female. In total, there were 24 goalies that tried out, 1 of those was female. He has 13 skaters and 2 goalies on his team that were picked. Out of that, the top goalie (by a good margin) was the girl. For skaters, the 2nd seed is a girl, along with the 8th seed. 3 of the other girls made the other top team, I can't comment on where the remainder ended up as I have no knowledge of where they play. This is my youngest son, the other 2 older ones had similar experiences while playing on top teams. There are 13 boys' teams made up at that age group, outside of this, there are 2 girls teams (that only play girls' hockey, and didn't try out) I realize this is still a hard argument for me, but I do feel that if you're a girl, who has an interest in sports to actually work at it. You may have an advantage hormone-wise over the boys until about age 12-13.
I realize this is a tough argument because we see so many girls/women in sports who are brutal. Just a unique observation I've made over the last 12 years.