True remarks, Duragrouch - but irrelevant if the method works (easily!), and the forces generated by asymmetry are not large enough to damage threads. Huge 2-handed wrenches are, to say the least, seldom on hand - and I reckon people who have a bench vise and clamp the spline socket in it seldom worry about gripping the bike frame on both sides to avert one-sided loads which all normal wrenches generate and which almost never matter.