In reply to subtle:
> I bet they use Roundup as well in the garden!
And if they use small quantities infrequently while adhering to the manufacturers guidance then they will most likely be absolutely fine. If they are working with it in bulk on a daily basis as the few test case plaintiffs have done then they are probably less safe.
It's like someone going to a moderately loud gig once in a while compared to the bassist in a rock band who stands in front of a drum kit and a speaker stack for 2 hours every night. Which one's going to be deaf if PPE isn't used.