I'm hating the fact that I'm about to quote Ian Chappell, but this one is a good point.
Before the introduction of helmets, every batsman knew if they were going to play particular shots, they had to either:
a. Make sure you were out of the path of the ball so it would miss you if you missed it, or
B. Play a different shot.
My personal opinion is there are now modern batsman, who have a false sense of invincibility due to their 21st century protective equipment. I know myself when I first started wearing a helmet in the late 90s, I got hit a number of times in my first season, playing shots I wouldn't have pre helmet.
If we saw a return to the pre helmet shots, where batsman got clear, we wouldn't see as many batsman hit.
As for being the safest, I think it's semantics. The brands will continue to leap frog with designs. But with mass produced items, it's almost impossible to guarantee 0% failure rate.