Great. Truer words were never spoken. (I worked for govt. agencies for more than 30 years, unfortunately, yet still retired almost sane).
Prior to around 1970 tapes/films of entire sporting events were simply not kept, even very big games like World Series. They kept highlight reels at best. That’s why you normally don’t see those games on ESPN classic, they don’t exist.
It’s obvious what happened: they were stolen by aliens.