A magazine safety isn't for "gun grab" protection. It's to prevent a supposedly unloaded weapon from firing when there's still a round in the chamber.
It also negates your ability to do a tactical reload while keeping the firearm functional, which is why no sane police department issues firearms with magazine safeties. Nor should any civilian shopping for a self-defense firearm consider one. On a range or hunting toy it's not a big deal, but there's no place for a magazine safety on a self defense weapon. The action of checking the chamber is not rocket science and no amount of technology is going to make up for poor gun handling.
When Col. Dave Hackworth was working on the Army's project to replace the 1911A1, he discovered that, over the Army's history of that weapon, it had killed more US troops through accidents than enemy.
I'm calling bullshit on that unless you have a citation. The M1911 went through two World Wars, Korea, Vietnam, and is still used by a handful of military units today. It went through all that but has claimed more accidental deaths than enemy KIAs? That strains credibility. More to the point, the M9 is no safer than the M1911 with regards to negligent discharges. Both have manual safeties. Both go boom if you disengage that safety and squeeze the trigger.
Sidearms are carried by troops who don't plan to use them.
They were used plenty in the aforementioned conflicts. In WW1 they were the preferred weapon when clearing enemy trenches. Which would you prefer when clearing a trench? A semi-automatic pistol that's easy to handle in tight quarters or a large bolt action rifle? A shotgun would be the ideal weapon of course, and we did use them, but they weren't issued as widely as the M1911.
Pistols are primarily a sidearm in this day and age, particularly as carbines have become the weapon of choice (pistols aren't even standard issue in most of the military these days, not even for most officers) but they still have a place on the battlefield. And at home for that matter, police and civilian CCW'ers find it rather hard to tote an AR-15 around with the same ease as a service pistol.