Because it ignores the relative amount of carbon produced by each approach. With electricity it’s fairly easy to have a true understanding, which takes summing from each source not just listing the worst offenders.

However, Oil is expensive in part from the vast amount of energy used for exploration, extraction, refining, and transportation. Just looking at carbon produced when burning gas is a vast underestimate of it’s true impact.

Even in Ireland going fully electric would significantly reduce their carbon footprint.