That herbicide article, as reported would not meet any scientific tests and of no use, so don't believe a bit of it.
First, they made no distinction between the many herbicides on the market--there are huge differences between the many herbicides available. Some herbicides us arsenic as an ingredient. Roundup, OTOH, has no arsenic and affects an enzyme that only plants use. 2,4-d simply makes a small rearrangement of a part of the indole acetic acid molecule, changing a normal plant hormone into an herbicide. Was the predominant crop in the study area one in which one of the more toxic herbicides is frequently used? Secondly, the sample size was too small--those results could easily come by chance--you need large numbers to make valid conclusions. Nothing was said about the location--were the farmers dispersed across France, or was it a local area where those with problems may have had wells drawn from one location vs. another location for the healthy location. A little thought could find many more faults with this "study", but dinner is ready.