Here is my source for the 2.5% of GDP claim.
By comparison: the moon landing (herkulesprojekt.de)|
Apollo peak spending year was 1966 at $2,967M, which is $28B adjusted for inflation. Apollo did not spend $28B in 9 years, they spent that much in one year. GDP that year was $705B unadjusted. Apollo spending was 0.4% of GDP by that reckoning. I do not know why the source I quoted is so far off.
Apollo Program Budget Appropriations (nasa.gov)
I've read that the three missions leading up to getting Artemis to land people on the Moon will cost $4B each. That is $12B over three years. GDP is $23T each year. Percent of GDP is 0.02%.
If we take your $93B for Artemis over 20 years and GDP averages no more than the current $23T then Artemis will use 0.02% of GDP.
Using the lowest Apollo spending of the sources I could find, we spent 0.4% of GDP in the leadup effort. Compare to your number and my number for Artemis, both of which are 0.02%.
It appears that we put 20 times the effort into Apollo than we are putting into Artemis.
Does this answer your concern?:
"after reading the article, I'm now absolutely certain that that something in the apollo missions reports was fudged and misguided"