We could make virtually infinite food as well, but that isn't profitable enough.

You're missing my point. Shortage and conflict is the default. It's not a fault unique to capitalism, and to say that it's its fault is missing the mark.

I'm not saying it's an ought situation or even an is situation; it's that I disagree with his diagnosis of what causes it.

Guess what, we have plenty of food

We have plenty of food because of capitalism (particularly the fact that we have plenty of incredibly cheap food grown by a tiny fraction of our population).