If we can make oil carbon neutral or even slightly carbon negative.. why not?
Unless you grow trees. They are - by far away - the most efficient and effective CC device that exists.
We need to sequester large amounts of carbon in the next two decades to avoid falling off the cliff of greater than 2 or 2.5 degree warming.
Ergo, planting well-thought out forests in large quantities, which has no known downsides, and large upsides is one of the actions we must do.
Not to mention that trees have excellent effects on local climate, on local pollution, on local human health, which are all great reasons besides carbon capture for planting more trees.
We don't care if carbon capture stops at midnight or doesn't run on a still day. As long as the average yearly carbon capture is slightly greater than carbon production.
Millions of vehicles could still be used and not replaced. We still have real and meaningful issues with electric vehicles that may not be resolvable. Battery chemistry is extremely reliant on very gnarly chemicals with their own environment issues.
The thing we want to fix is global warming.
About 19.64 pounds of carbon dioxide (CO2) are produced from burning a gallon of gasoline that does not contain ethanol. About 22.38 pounds of CO2 are produced by burning a gallon of diesel fuel.
Just think of the numbers involved to scale this to the planetary usage of fossil fuels.