Full disclosure- I'm a brand new Tesla owner. (2 months today) That said, I totally understand the slow approach in releasing the FSD rewrite beta. Don't discount how much these autopilot accidents (and death) hurt Tesla. When talking with friends and family about my new car and autopilot/FSD, the first thing most of them ask is "haven't a lot of people gotten killed using that?"
Every time there's a bad accident with a Tesla that was on AP, it makes the news. The perception among the masses is it is unsafe. My wife doesn't feel comfortable when I engage AP. My mother-in-law outright asked me NOT to use it while she was in the car. This- even with my hands on the wheel and eyes on the road.
So even though Tesla is not liable, imagine if there was even a small issue that led to an uptick in accidents. It would most certainly be all over the news. (If Elon sneezes, it makes the news) While they wouldn't be held liable, it would still hurt the brand, possibly severely. There is no upside in a quick release, only downsides. The limited release makes perfect sense from a good business strategy standpoint, as well as moral/safety reasons.
I wish I'd been chosen. I drive like a granny.