Not to get too far afield, but another complication in the percentages is that some sports (tennis and ice hockey are two that come to mind) have a lot of international athletes playing in US colleges, and other sports are almost all US kids. The percentages are probably more accurate where the pool is mostly in the US, unless there is some kind of adjustment for that.
Regardless, the key point is still that in most sports, the odds are long.
@Ohiodad51 I think your daughter’s experience is probably pretty common. It seems like a lot of these clubs have plenty of girls interested in playing up through 15 or 16, then the numbers start to drop substantially at ages 17 and 18.