>Bananas and grapes produce very few to no seeds at all.

Because we modified their genes with selective breeding. Unmodified banana.

>In other words, you have to buy seeds from Monstanto every time you re-plant.

That, too has also been done by selective breeding.

The point I obviously failed to make is that selective breeding and things like CRIPR aren't on different levels of modifications. Just other tools used.
That's why the debate about GMO, which afaik also considers selective breeding, isn't black and white but rather complicated.