Except applied roundup decays in 3 days. That’s why no one is dying from eating products grown with roundup. If you are a landscaper using roundup for hours on end every day and are not heeding the warnings about exposure, you are just asking for cancer, same as with any herbicide or insecticide.
In a photo lab, we had a cine processor operator develop contact dermatitis from the developer. He was advised to wear rubber gloves.
So, the next time he got his hand dipped in developer, he went over and put on rubber gloves. After dipping, not before. And even then, he didn’t rinse his hands, but stuck developer laden hands into rubber gloves.
I don’t know whatever happened to him, but he most likely succumbed somewhere to terminal stupidity.