If it was glyphosates, this would be a much more widespread problem. Roundup/glyphosates are used extensively all across the US and we would be seeing similar statistics everywhere.
But the doctor in the OP explicitly pointed out that they had increased levels of glyphosate in their blood:
> He also warned that some patients' blood work showed elevated levels for compounds found in herbicides such as glyphosate, and said more testing should be done to rule out environmental toxins, including the neurotoxin BMAA, which is produced by blue-green algae.
https://www.cbc.ca/news/canada/new-brunswick/new-brunswick-n...
Just because glyphosate is everywhere doesn't mean it can't be concentrated in a particular place.
To be clear I'm not taking a stand for the glyphosate argument at all. I just don't think your line of reasoning is a fair counterargument in this case
"Melissa Nicholson said her 59-year-old mother, who has suffered for four years with a neurological disorder, received test results indicating she had levels of glyphosate in her body that were 47 times higher than the acceptable level."
This is bizarre. Either she lives right next to a farm that's spraying it, and she's getting it blown into an open window in her house where she's breathing it, and then immediately went for a blood test... or she's somehow ingesting it in/around her house (like from a bottle of Roundup that keeps getting splashed on something she's ingesting).
Commercial forestry at JD Irving's scale largely died out in much of the US excluding Maine (where it is also has inordinate political power [1][2]).
[0] - https://www.conservationcouncil.ca/wp-content/uploads/2019/0...
[1] - https://themainemonitor.org/maines-future-with-irving/
[2] - https://mainebiz.biz/article/the-irving-influence-a-look-at-...
Additionally, Industrial scale lumber harvesting uses magnitudes more Glyphosate than a home gardener or your local HOA.