Doesn't specify the effective area. Does every use wipe out the vast majority on the planet?
Of course. If you throw some bacteria into a gallon of hand sanitizer then put it all in a blender to ensure good mixing, I am certain it will. But that’s not how you’d actually use it, right?
... leaving only the hardiest survivors, who now replicate in no time, now with resistance.
they don't have resistance
Of course bacteria have resistance. Bacteria mutate, some random mutation will be resistant to a given antibiotic, and that new strain will propagate and dominate.
Lots of people fall to understand that, which is why we have antibiotic-resistant strains of gonorrhea in the wild now.
Hand sanitizers use alcohol, not the same thing as a "prescription" antibiotic. The same resistance arguments do not really apply the same way.
Many use triclosan, which was even legal in the US until last year, so a lot of it is still in consumer hands.