Is there any proof that he’s not actually an alien living in a CIA agents attic in Northern Virginia?

You are mistaken, that is a myth.

Why is that an issue?

What’s the point of worrying about it. It’s inevitable, and when it happens you’ll not care because you won’t be able to. So what does it matter

Because people are stupid. Stupid people believe stupid things. They don’t have logic, just stupidity.

And why do you need a hit man to kill a 3 year old anyway? They’re easy to kill. This is just laziness.