Far-out theories need solid evidence to be believable. However, there is not even circumstantial evidence to suggest that anybody was five decades ahead of public technology. You might rather claim that the military has super advanced aircraft, at least we have lots of sightings of UFOs doing apparently miraculous aerial acrobatics.

50 years for large models is a stretch, though TI did have smaller, real-time field-trainable neural nets almost 40 years ago:

https://en.wikipedia.org/wiki/FGM-148_Javelin#Seeker

It was featured in one of the Modern Warfare games from around 20 years ago, and I looked it up because back then, I called bs on the fire & forget aspect.