We don't actually know the extent of impacts from either our oil use or potential cuts. We have modeling data that we extrapolate out, the issue I'm raising is that we get stuck in a loop of people debating whether the modeling data is accurate, complete, or predictive.
There are changes we can easily make without knowing those answers. If we can make simple changes that at a minimum wouldn't hurt the planet and almost certainly would help it, why don't we? My read is that we simply must not care. We don't need to buy as many things as we do, or to expert those costs overseas. We don't need to travel the world by plane. We don't need the latest iPhone made on the other side of the planet. We don't need LLMs. We do it because we like convenience and novelty more that we actually care about our impact on the planet. And we avoid implementing real solutions by first demanding that we have a complete understanding of the cause and blame.