I would love to play couple of hundred rounds of golf with my pals before entering a tournament. Public golf courses are everywhere in SocCal so that's actually possible. It's pretty tough to find a place to have a friendly afternoon slalom competition with my friends and get confident enough to think I won't embarrass myself at a tournament amongst people who belong to ski clubs with monthly dues higher than my boat payment.
Without easy and inexpensive access to courses on public waterways, the measure of skill for "serious" recreational skiers will continue to be big spray and touching shoulder to water.
Why are there no laser-projected slalom courses on the market yet?! Plug in, focus, ski, unplug, go home.