This is so ridiculous I don't even know where to begin. Apparently, and without any evidence given, humans cannot fly to the moon anymore and that's why we don't go: we lost the ability to do so and we're ashamed to admit it. Again, there's no evidence for this, and no attempt to explain how or why we have advanced so far in so many other areas. Then, as if this stupid theory wasn't enough to offend the intelligence…
Since the mid-1970s the rate of progress has declined in physics, biology and the medical sciences – and some of these have arguably gone into reverse, so that the practice of science in some areas has overall gone backwards, valid knowledge has been lost and replaced with phony fashionable triviality and dishonest hype. Some of the biggest areas of science – medical research, molecular biology, neuroscience, epidemiology, climate research – are almost wholly trivial or bogus.
If anyone really thinks progress has slowed in either physics, biology, or the medical sciences since the 70s, I would be happy to debunk those claims, but I'm not going to even bother up-front, it's so absurdly wrong that I doubt anyone will even ask for a reference...