Just because a gun has an inertial firing pin doesn't mean it can't be fired with an inadvertent drop. or impact.
Most modern handguns have inertial firing pins. The likelihood of an accidental discharge from a drop or a slam from such a gun is arguably quite small -- the coincidence of angle, height, or force of strike would have to be just right, but it can happen.
I personally wouldn't remove any safety device unless I was absolutely sure of the effect of that change.
Lots of folks have removed them -- and a number of guys here have done it on the SA models, and adjusted the internal workings to optimize the trigger. For a competition gun it's certainly OK, but for a gun used around the home, or for home defense, I'd be more wary. (In the competition venue, there are a lot of safety precautions taken, people are out of the way, etc. etc.; that won't happen at home.)
[bleep, that reads as though it was written by a corporate lawyer trying to avoid a liability lawsuit. It's not meant to be a copout, but an effort to not offer bad advice.]