It's actually not advanced enough. Corridor digital had a video discussing this in the context of John Wick:
It's still very difficult (and more relevantly, very expensive) to do CGI gunshots that look right, and even harder to do the actual filming when the actor's guns aren't really recoiling. The JW films can get away with a lot of that by being so fast and fluid you don't notice the issue, but on other films its a big deal.
I disagree, but only partially. Yes the armorer is clearly at fault here, for misloading the gun or losing track of which gun was loaded with what.
That explains why Baldwin became the point of failure, it does not excuse or absolve that failure. For some things, I could by that. If the gun was unsafe because of some obscure design feature that the armor didn't address (like some black powder revolvers running the risk of having all the rounds in the cylinder go off at once because it's just loose powder back there and not a cased round), fine, Alec gets a pass on that, it's not like he's going to know every trick of every gun ever made.
In the specific case of "are there bullets in this gun, and how should I handle it regardless of the answer to that", no, he does not get a pass. That is firearm safety 101 level stuff and if he doesn't know that, after a decades long career of not only shooting movies that have guns in them but using guns in those movies, that is his fault and his error, and it is further the fault of whoever decided to give an undertrained actor a gun.