Indeed, and a trailerable 22' sailboat would require a pickup or SUV, so that's a no-go for jules
Believe me, I've considered buying and trailering a boat but a) I have no way to tow it, and, b) I have nowhere to store it when it is not in use. Plus you have to factor in time to set the boat up to go in the water (put the mast up, take it down after etc). By renting I can just drive down to the marina, hop on the boat and we're off 15 minutes after we arrive.
If I bought a sailboat I'd probably go with one I could keep at a marina in the water all the time but for a 30' boat it would cost close to $500/month just for slip fees so I'd probably want to do a partnership with 1 or 2 friends if we did that.
To rent here I had to submit my sailing resume and take a written test that covers boating terminology, right of way questions, etc. It wasn't a long test but it did focus on those two topics mostly. They also had me sail the rental boat away from the dock, go out, come about, and sail back to the dock area just so that I would be aware of how they want it done when we returned at the end of the day.
A novice would be required to take one of their sailing courses and take one out with a skipper to demonstrate his/her ability to safely handle the boat before he/she would be allowed to do a bareboat rental. They rent sailboats up to 41' in length.