This is such a weird complaint. "The shot" is the one where he's standing in front of the blast off. Of course the shot before it is a different shot. Who cares?
No, because then the rocket would probably launch in the middle of the sentence. He had to start saying that sentence at the right second and pace the words and his movements perfectly.
It's not a "weird complaint" at all. The cut goes to the heart of why it's supposedly impressive. Because of the cut, all he had to do was say one sentence before the rocket lifts off (which is happening at a time that's known down to the second).