With the availablity of durable, affordable and small action cameras, cockpit recordings do a lot towards safety and preventing accidents by understanding and correcting small errors beforee they line up through the Swiss cheese holes.
I consistently record my flights for debriefing, and watch other people's similar recordings on YT. Very educational for low-hour pilots in the danger zone.
The risk of being ridiculed, or even reported to authorities is very real, some people behave as if they had never been beginners or made any mistake, give you summary statements like "never fly again", "go back to school" etc. However, this problem is greatly overwhelmed by the benefit that some other people will actually analyze the situation with you and can help pinpointing the error(s) precisely. One just has to ignore the noise of useless comments.
Having a camera on board will eventually lead to recording your own acccident, if you get into trouble. But it is again still better to know what went wrong afterwards, than having only speculations. Cameras can be on your side too, proving near-misses caused by others, misleading radio comms from others, aircraft malfuncions and your actions.
So overall, the greatest benefit is preventing accidents in the first place.