That’s the real bread and butter of conspiracy theorizing: claims that don’t matter to anyone’s real lives whether they’re actually true or not.

Therefore they propagate primarily for entertainment value and face none of the friction that you’re imagining being generated by “doesn’t actually make useful predictions about the world.”

The government spent a lot of time and energy pumping up UFO conspiracy theories to hide sightings of classified aircraft, and they're getting pumped up again in the age of developing cheap weaponized drones.

I would not be surprised that the whole human sex trafficking and Qanon related conspiracy theories are also psyops to hide what's actually going on in plain sight. Obviously, Hillary Clinton wasn't trafficking kids in the basement of a pizza parlor, but there is literally a cabal of elite sex trafficking pedophiles that own and run everything, and one of them is the president.