Statistics in and of themselves are useless.
It's extremely important if it almost never happens. If there is NOTHING to support the fear that the SA's reload speed is a disadvantage, then you have no argument. It's rather difficult to justify the fear of something that is statistically unfounded. Like the warnings about handloads for self defense. For all the bickering about that, it's still just a theory. I believe I better stack the odds in my favor every time I spend two hours popping a couple hundred rounds though single actions, than I would if I carried a gun I rarely practiced with.....because an internet expert thought it was more socially acceptable.
I don't carry a reload anyway so it's really all moot.
Like Ayoob writes in the current edition of American Handgunner:
"...courage, determination and skill will be more important than what kind of gun you have."