the important thing is nobody really knows for sure which is the true origin of oil, so we're going to act as though it's the really convenient one and be all affronted whenever anyone suggests otherwise.
except... even if it's the convenient, abiotic regenerative origin... that kinda means we could potentially put more CO2 into the atmosphere than was ever present at any point in the planet's past. Like, if it were fossil fuels, then even if we burned every last drop there would still be some form of life that could survive the conditions, cus it was life that trapped all that carbon in the first place. But if we're just pumping an endless supply of complex carbon chains....