No expert here either but I agree that produce and products that originate from or contain GMOs should at least be labeled as such so that those who wish to avoid them can do so.
My limited understanding is that the GMO seeds are expensive and that farmers cannot use last year’s crop to generate new seeds, like they normally would. Instead, Monsanto requires they buy new seeds from Monsanto each year. Also, the GMO seeds contaminate their other similar crops–wheat to wheat for example, so if they grow GMO wheat and regular wheat, the GMO wheat contaminates the regular wheat in some way.
I also find it frightening that humans again think they are so superior that they can defeat 1000s of years of evolution in a petri dish. Certain plant species evolve to adapt to certain environments–to be draught resistant or to survive certain infestations. In the case of Inida, to try to wipe that all out with a man-made GMO crop…it’s the worst kind of arrogance.