[Greetings_Puny_Humans]

You think the Founders were actually doing that?

Well no, which should be self-evident in the post you just quoted.

[FreeReign]

as if" they were natural born, IOW, a legal fiction, without actually being clear that they are well and truly natural born and eligible to be President.

Okay. You know it to be a legal fiction.

Why would they do that?

I have no idea what the last part of your sentence says.