I think a good way to look at this is to see just how many fingers are in how many different pies. You seem to be looking at the fossil fuel emissions problem 2-dimensionally when it is much more nuanced than that. Off the top of my head, you have to consider not just the consumers emissions or the manufacturing of the oil and gas, but the fracking, the constant construction of new oil pipelines, refineries, oil rigs, coal burning power plants, the emissions from all of those after completion, deforestation, then last, but probably the worst of all, the plastics industry which is intrinsically linked to the fossil fuel industry.

This is still probably missing a lot of components, but the point is, the individual pales in comparison to the amount of emissions that these companies are responsible for and it makes it worse when you consider that if they were to have a change of conscience and pivot to renewable they would still be mega profitable.