This is a good example of correlation not being causation. GDP is really just a measure of activity within a framework to measure it. It has nothing constructive to say about the real value of the activity, just that it is happening as measured in a currency.

Besides, the inventor of GDP warned against using it as a measure for policy making, but as with many things in human affairs, oversimplified things that give an impression that helps manipulative people is just run with, regardless of the insanity of it.

BMI is another good example of not only a useless, but even more damaging and dumb fake metric.