LI (well, really Nassau and Suffolk) has 3 million residents and Westchester has 1 million. LI def has more than 3x number of D1 players than Westchester.

Even if you (correctly) assume more than 3x number of kids on LI play lax than in Westchester, LI still has way higher % of D1 players.

Sure, some kids in Westchester are great and some clubs are good and some high school teams kick [lacrosse] but, overall, LI is way bigger, deeper, better.