As has been pointed out almost endlessly over the past day, almost all the mass in the rocket is in the lower end by the time it hits the pad, so despite what a

As has been pointed out almost endlessly over the past day, almost all the mass in the rocket is in the lower end by the time it hits the pad, so despite what anyone can imagine it isn't that hard to keep it vertical. The hard part is landing it softly enough and vertically enough that it won't break or fall over due to residual velocity. Once it's down, in low seas, the few degrees wobble of the barge won't have an effect. Or in other words: I can't imagine SpaceX engineers haven't worked all this out in detail, and I can't imagine SpaceX would be trying this if they didn't have good reason to think it would work, and I can't imagine that SpaceX engineers aren't professionally competent, so, based on the standard "what I can't imagine can't be true", Shotwell is spouting irrelevancies. This is the problem with imaginary arguments: if anyone thinks that what they can or can't imagine is relevant to what is true, they have to yield the argument to me, who can't imagine there is anyone in this day and age who still beleives that.