Cheap extraction leases on public land.

Huge military investment in oil-producing countries and regions.

Building and transport codes built around the needs and technologies of dinosaur burners.

Lack of significant restrictions on emissions.

I don't think you're gonna get back the sum of the decades of subsidies of various sorts that cut the cost of technology developments.

(yes, I know they aren't really "dinosaur" burners but alge burners)