RU srs? Entry points man, entry points. We had dirt biked growing up and rode out the garage to the fire roads and back. No reg back then. Stickers are the thing now, not sure how much they cost. On busy coastal areas, you will wait in line to launch. Many families I know own skis. My colleague just bought two sit downs with trailer. It's a project to spend a day at the bay. When I was skiing, we went from Petaluma to lakes north that were set up for the sport. Many, many restrictions the same as boats. Simple geography dictates accessibility to dirt riding is virtually limitless, and plated bikes transport themselves. It's ridiculous to suggest a young person can buy a "cheap" standup and get as many hours of use a year as someone owning a beater XL250 with plates.
I get it, you love jet skis. I do too. My friends own them. They have disposable income and lots of driveway space. Socal is prime territory for salt water skiing. You know, you've been here enough. I use AI for a lot of tasks, but never writing forum posts, lol!