The vehicle that took them there cannot be built today...
Ok, I won't bother you with the facts, since your raving moonbat mind is already made up.
In one aspect you are correct, though not for the reasons that you think.
The Saturn V can't be built today, much like the Giza pyramids can't be built today, nor could another Panama canal be built today. None of them for lack of technology. All of them can't be built today for two reasons. One, there is no need and two, since there is no need, no one would spend the money necessary to do so.