Ah, but you left out one key part to all of this:
Extraordinary claims require extraordinary evidence.
The alien analogy? That was deliberate satire. No I can't technically prove that you haven't encountered aliens, but I can say with 99.9999999999% certainty that you haven't. Same with Santa Claus, or faeries, etc.
Same with whether the Seth Rich CTs are actually true. See, in the CT fantasy land, an 0.0000000001% chance of something happening means it just might have happened! But that's not how the real world works. In the real world, that's as safe a bet as you'll ever make. So in the real world, it's perfectly fine to call media figures such as Hannity and Gingrich who peddle CTs as idiots.
But you've clearly shown that you don't understand common-sense arguments, so I don't expect you to understand this one, either. CTs **** with your head and your ability to understand even the simplest of logic.