"far more of it"? How far back are you looking? The participation rates have been really high for a long time - have it really grown that much in the last 5 years (I generally consider "few" to mean 3 but I will back it out further)? I'd be interested to see the trend over the last decade - I do think there are many skilled players, maybe even more of a certain skill level, but I don't think the # of competitive players has changed any more than can be attributed to odd demographic blips (some groups more, some groups fewer)
(not sure how it is in SoCal but the # of girls generally seems lower in the Bay Area in the 06 age range (or maybe I should say the 05/06 group who will be class of 2024) - my twins' classrooms in elementary school were often 2:1 boys:girls and, in speaking to other people from around the Bay, they had similar odd ratios; that is very different than my older girl (02, class of 2020) and my oldest (my son, 98, class of 2016) (my 02 daughter's first club - a very small club that none of you would have heard of - had 3 teams at one point at the 01/02 level, something that is not possible with my 06s at the same club; the club she joined at U13 had a HUGE # of competitive players in that 01/02 group, demographically similar to our local community).