This is all seed oil panic not based in real science. Olive oil has less omega 3s than canola oil. Omega 3 vs Omega 6 ratio is not a "key mechanism of action" supported by coherent science. It is instead crank stuff extrapolated wildly from research. Frying potato chips in butter won't make them healtheir.
People do studies on hexane residue in canola oil. We don't find it in our bodies. "This sounds weird to me" is indeed how a lot of this panic works. Vibes.