And where is your knowledge coming from?
I am certainly not a biologist, but as far as I know, there are quite some plants that are edible in the breed we eat - but a different wild form is toxic (carrots for example). How are you sure, the wrong (dormant) genes do not get transfered and activated, without testing?
Or even with the same plant, potatoes. The root is good for us, but the flower is toxic.
In other words, you always have to do extensive testing, when you play around with genes.
Genes are not computer modules you just swap around and turn on and off. It is way more complicated.
Like, say, Galileo?
I agree that the anti gmo/vaxx etc. crowd is quite irrational in many regards, but I can see a difference between traditional breeding plants - and directly editing DNA.
And surprise: many plants are poisenous. And even with the slow method of natural breeding, poisenous traits can creep back in. The potential and speed of GMO methods is just way higher. For good and also bad results. So it is not the same.
Just like with vaccines having plenty of resistant food so people don't starve far overvalue whatever little side effects you might get.
It is, but with a technology, that is not fully understood.
Or is it fully known for example, why cloned animals live far shorter, than the original? Not as far, as I am aware.
Also, GMO is mainly criticized for its combination with pesticides. The people who believe it damages their souls, are not many.