Your argument was that people pick Tesla due to reason X and do so with overwhelming majority. That means your argument is Tesla-vs-everything else combined NOT

Your argument was that people pick Tesla due to reason X and do so with overwhelming majority. That means your argument is Tesla-vs-everything else combined NOT Tesla-vs-another specific competitor. Your own data shows that at best 50% of buyers choose based on reason X while the rest do so for other reasons. I don't consider 50% to be an overwhelming majority or vanishingly small.