Well, I wouldn't put it past a lawyer. But selling the seed would be the same as selling a joint as far as civil liability goes, or at least close enough to ensure any seed company would soon face a massive lawsuit.
My point isn't against "growing your own", that is perhaps the strongest argument. My point is that legalization, as we think of it with other products, simply wouldn't be possible in the current tort atmosphere. MJ might make a go of it with hefty insurance costs tagged on, but other more harmful drug manufacturers would simply be unable to make it work. The pharmaceuticals have a hard enough time with drugs that have medically redeeming purposes.
I'm talking about suing the manufacturer of the product for damages.
You can't sue a tomato manufacturer if you grow and consume your own tomatoes.