Fool is just a silly name for an investment-idea website.
Even if oil were purely a fossil fuel, and not abiogenic, there’s still a whale of a lot of it not yet found. It’s assumed in these estimates that if not yet found, it isn’t there, which is not true.
Who would have thought that North Dakota of all places would have such oil reserves?
Betcha that there are PLENTY of reserves out there, in the USA that haven't been tapped yet.
IMHO, the US has enough oil underground to provide our needs for at least 1000 years. If only we have the guts (and political will) to actually go get it.