Like I said, you didn't have to invent anything new. In this case you put yourself in the awkward situation of having to reinvent the wheel by your own incompetence. So if you actually do do it, what have you proven?
>It would be even more expensive and worse in every way.
Worse and more expensive than what? The only rocket that has flown men to the moon is Saturn V. What exactly are you comparing it to?
Let me make this point very clear with no distractions:
The "you're certainly not learning anything new" argument only works if we do reuse old techniques. "You don't have to invent anything new" is not sufficient to support the argument.
> Worse and more expensive than what?
Trying to reinvent old techniques and rebuild a bunch of machines and factories that used those techniques would be worse than inventing new things. You'd have to deliberately choose to not learn anything and to waste extra money in pursuit of that choice.
> The only rocket that has flown men to the moon is Saturn V. What exactly are you comparing it to?
We don't have a time machine, so the contenders are "2020s rocket with techniques invented before 1970" or "2020s rocket with techniques invented before 2030".
> So if you actually do do it, what have you proven?
If you actually do it, in a reasonable way, then in addition to the inventions and learning and any proof to do with that, you prove you can go to the moon, because saying "oh of course we can, we could use the old method" is not a particularly strong claim as industries change and workers retire over the course of more than half a century.
Like I said, you didn't have to invent anything new. In this case you put yourself in the awkward situation of having to reinvent the wheel by your own incompetence. So if you actually do do it, what have you proven?
>It would be even more expensive and worse in every way.
Worse and more expensive than what? The only rocket that has flown men to the moon is Saturn V. What exactly are you comparing it to?