The joke is, more or less, you can reduce everyone into two piles. But that's almost assuredly wrong.

It's very very hard to have what most people would call "autistic" levels of rationality in discourse in this world. But if you hold yourself to high standards, you quickly compute the logical argument OP is making (people who were excited were gullible marks etc. etc.) and realize it's wrong in several different ways (happy to explicate if unclear).

This is, of course, very easy if you were A) excited and B) didn't think it'd come to pass. Also observing that A does not imply B and vice versa is the minimally sufficient observation to rule out OPs comment being rational*

* n.b. "rational" means something akin to "not affected by a psychoactive disorder" in everyday discourse. In philosophy / logic class, it means, the statements x conclusion are internally coherent. "The moon is made of cheese because it is yellow" is rational, "The moon is made of cheese because Teddy Roosevelt likes cheese" is irrational. "The moon is made of cheese because the Pope likes cheese" is rational with the implied premises "God controls all, and he loves the pope"