You are 100% wrong. Just to show you this man is a HOF shooter has held world accuracy records in the past and I have spent 100's of hours in his shop. You head would explode if you were to witness even how he carefully turns brass including the lube he uses so heat will not impact the machining of the neck thickness just as one step.
Speedy does not waste his time weighing cases. Conducted exhaustive research on this and it is of no benefit. Some folks still do it, but they are not gaining anything by it except making themselves feel better. With some people that is all it takes and if it helps them so be it.