You may not know this but oil comes from cyanobacteria or algae blooming, dieing, and falling to the bottom of ancient lakes. We can farm them better than they could ever grow on their own in nature, just like we do with corn, rice, wheat, and a hundred other crops. The only complex part would be the scale required. We have the technology to industrialize hydrocarbon production that way today. Life isn’t magic, so there’s no reason we couldn’t do direct synthesis with more controlled processes. And yeah it’s going to require resources. Everything does. It’s just pretty fatalistic to think we won’t be able to bootstrap ourselves up to current technologies without oil when we’ve already done it once before. Oil just makes scale possible, not the technology itself.