Just read the beginning so far, but it sounds like home-grown is safe (even if not self-started plants) ? Ie, the article (so far) makes it sound like it's an issue of soil microbiome. If that's the case, and I no-dig grow my own veggies, I'd be okay?
They are saying corn is toxic because it has round-up chemicals in it - and they can't be washed off. So growing food in your backyard, assuming you don't spray it or have heavy metals in your soil that are ingested by the crop, are likely fine. How alive is your backyard's soil? A lab would have to analyze it. It may or may not have the right minerals, depending on what you're trying to grow.
I brought in a lot of compost to "start" it, so who knows what is in there. Furthermore my home is recently purchased, and the previous owners did the land no benefits (unkept dogs in the lawn, terrible looking dirt, etc). However I'm working towards / practicing no dig, heavy mulching of both green and brown (both in beds and out of beds) to promote natural breakdown and soil improvements, and tumbler composting (to combat rodents).
I plan to soil test in a few years, once I've become more established. Right now I'm primarily concerned with establishing whatever is sustainable for me, and then measuring what I might need to tweak. We'll see how it goes, hah - I'm pretty new to all of this; and I have more yard than I (an indoor man) knows how to deal with :D