You can make toast out of cattail pollen or acorns. You don't have to use wheat, that relies on extensive agricultural machinery.
I think my point stands. And that's that there's ways to do things that reduces thr need for higher technologies and so much fossil fuels.
We can stop using fossil fuels completely. But we can start reducing our use.
We're going to have to eventually anyway. Collapse now as much as one can, and avoid the rush, as Greer says.