I agree.

I think the bottom line here is that limits to available acreage are very important for plant-based fuels, and unimportant to everything else (oil, solar, wind, nuclear, etc).

Yes. It's a silly comparison, and I think even the author knows it.

The central constraint for oil production and especially photovoltaics are capital investment costs.

For PV, acres are irrelevant, we have plenty of low-value land with sunshine.

Panels and transmission lines are central.