"Kiteboarding, access to the wind and ocean, is an undeniable right..."

This is true, but the access to the land in order to access the water is a privilege. This is where they have control to limit access.

If you take a boat out and water launch you won't have a problem, but how realistic is that for most people?

The main problem down there seems to be a very limited number of launch areas so problems are localized.