We've been modifying and breeding plants and animals for thousands of years. All that's happening now is the process is speeding up. We know that sometimes it doesn't work (see Banana's), but in general things get better.
Better == What we optimize for. Which lately has unfortunately been appearance and shelf life, not taste and nutrients.
Whats more unscientific; genetics are scary and we should never intentionally modify genes for our benefit, or lets investigate what can be done with this new tool? I'd say that investigation and experimentation would be the scientific thing to do.
Sure experimentation is great, but they're doing it on people. Those food aren't even labeled as such in the markets in the US and the effect they are having on agriculture is enormously problematic. e.g. Monstanto suing farmers. And how do they modify those organism? With radiation. This is not your father's brand of genetics.
That's a huge unscientific leap to say that. We don't know GMO is safe. And it's certainly not logical to say that concerns about them are crap.