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.