I did last week, and walked out with it that day. I had 6 hours of instruction very focused on safety and discipline. Most I tried had safeties like this, not at all just glocks.
And I've seen multiple threads online insisting people should keep their gun loaded and chambered at home, even though they'll likely never need it for defense, and it takes under 2 seconds to slap in a mag and cock it. And if the gun were pre-cocked, it would just chamber automatically anyway.
I tried kb&m for Witcher 3 for about 5 minutes. It was miserable.