> That’s a silly argument, we could build pyramids 100 times bigger than the Egyptian ones if we wanted to today, and we can build engines that are far more efficient and powerful than the Apollo ones.

You seemed to have missed a couple of points there. Of course we can build the pyramids, but can we do it with the same level of technology that we think they had? Of course we can build better engines than the Apollo ones but can we recreate exactly those? These were the questions post to highlight that we have lost knowledge before.