We launch all the time with no problem these days, If all that stuff that came after the launches is so easy, why do we never just throw in the 10% more effort on any one of the modern launches and go back some time? I'm not arguing the moon landing was a hoax here. Just pointing out the obvious followup question to what you said.
90% or more of launches these days are for ruthlessly commercial reasons.
and the next people to make the effort will be doing it for ascendant prestige which means china, not the tired old west. it might even be a private operation.
and that whole era was a freaky anomaly. there's no appetite to push the limits any more. these days it takes airliners longer to fly many places than it did back then. the world's fastest plane designs like the sr-71 and x-15 are over 60 years old now.