I think the lack of scrubs of SpaceX launches mostly comes from Falcon 9 being an absurdly powerful rocket with great margin of safety for the payload/missions

I think the lack of scrubs of SpaceX launches mostly comes from Falcon 9 being an absurdly powerful rocket with great margin of safety for the payload/missions it takes. Thus it can often launch in sub-optimal conditions, still complete it's primary objective -and- recover the booster.