Hand sanitizer kills germs, which means the survivors are less likely to be killed by hand sanitizer, so when they multiply their “descendants” will carry the genes that protected them (at least a little bit) from the hand sanitizer.
Soap and water, on the other hand, just wash the germs away. They don’t die, so whatever germs remain behind on the hands do not have a genetic advantage that will allow them to “evolve the species” in a way that will protect them against soap and water.
Hand sanitizer kills germs, which means the survivors are less likely to be killed by hand sanitizer, so when they multiply their “descendants” will carry the genes that protected them (at least a little bit) from the hand sanitizer.
Soap and water, on the other hand, just wash the germs away. They don’t die, so whatever germs remain behind on the hands do not have a genetic advantage that will allow them to “evolve the species” in a way that will protect them against soap and water.