I strongly agree with Tokarev and RevolverRob.
The Beretta safety, and pretty much any slide mounted safety, is not desirable. If how your hand is built allows you to swipe it off with your thumb, good for you. That's not everyone. I can
not swipe off a Beretta or S&W 3rd gen safety with my shooting hand thumb. No amount of statements on the internet about training will change that. I'm not an anatomical expert, but however my thumbs are built simply doesn't allow it. It's a stretch, at best, and certainly not reliable nor an intuitive motion. Thus, I needed to use my support hand thumb to disengage it. This may come as a surprise, but that was a practice taught in the USMC because of the wide range of shooters going through the programs and the inability of people to reliably manipulate the safety. Having been through the USMCs pistol training, as well as law enforcement and commercial market training, I have a hard time agreeing with the statement that the pistol training was "Criminally negligent". The quality was
absolutely better than FLETCs program, as a point of comparison.
Taking the attitude that you can just swipe it off when establishing a grip only addresses a portion of the problem....what about when the gun is out of the holster, but you don't yet have a PID'd threat that you're actually drawing down on? That can cover a pretty significant amount of pistol use, especially among the people who carry 92FS pistols the most (military PMO and civilian LE). If the answer is, "Well just swipe the safety off when drawing it, even if you don't have an immediate PID'd threat you're drawing down on", then what is the point of the safety?
That whole idea is an admission that the safety is unergonomic, anyways. A safety should be easily manipulated by the broad range of shooters using it, and in such proscribed ready/carry positions that the pistol is reasonably used. 1911, M&P, yes.....Beretta, 3rd Gen S&W, not so much. Going back to what @
RevolverRob insinuated, if the safety wasn't garbage then the G model wouldn't be as popular. Maybe your thumbs allow easy manipulation, but that doesn't mean everyone on the market has your thumbs, and the market trend is pretty clear evidence that the safety is suboptimal.