I don't understand the constant claim that the ability to equally use a firearm with either hand is undesirable.
I've been carrying Glocks and double-action revolvers for the most part for the last 8 years. Sure, I love my beloved 1911s. But you know what's hard? Picking up a stock 1911 with your left hand, knocking off the safety (one-handed), and firing it.
I practice shooting partly because I need to know that in a gunfight, I can do what needs doing. While the chances of getting into a gunfight are small, the chances of me getting shot in a gunfight that I'm participating in are actually pretty high. (Well, higher than I'm comfortable with.) Given that my strong arm would likely be presented to an adversary in a gunfight or even a blade attack, the chances of my strong right arm or hand being injured aren't inconsiderable. Why not have a good plan to end this thing?
I qualify twice a year, and shoot quite a bit more than that. I don't shoot enough left-handed. Whenever I do, I'm reminded of how much I suck at it. I don't see any point in making an already difficult task near impossible. I like small auxiliary ambi safeties.
Admittedly, some ambidextrous safeties aren't made properly or installed properly. I am assuming that you have a quality part and installation. Swenson has made some fine ones for years.
So here I am, at odds with friend Jim Wilson. At least Jim and I agree on the uselessness of full-length guide rods.