I hear what you say and partly agree. However many people are convicted for ‘accidental’ shootings. Anyone with a gun should have basic safety training, including how to check the status (loaded/unloaded) of the gun. Baldwin lives in one of the most gun restrictive states in the country. He is anti-gun yet not responsible enough to understand basic safety of the tools of his trade? He definitely has a major part in the responsibility IMHO.
Yes, he ultimately bears some level of responsibility. What that is remains to be seen as the facts unfold. Even though there are layers of safety protocols on movie sets and you trust at some level others are doing the safety job they’re paid big bucks to do, you’re ultimately the guy handling the (potentially deadly) prop and you should have the awareness at least to do your own safety check.