But, has the FDA told Roundup they have to add cancer warnings?

And hand sanitizers are a worse problem then the problem it set out to solve. Your hands getting dried and cracked from repeated applications is far worse.

Sure, the germs are gone... in that moment, but the next they all start moving back into this vacant area. Worst is many of the germs killed weren't harmful. And actually beneficial since they take up space denying a harmful germ.