According to this article, why does "the fate of the aliens [remain] up in the air"?

According to this article, "New Mexico Tourism Campaign Featuring the Ugly", Aliens draw critics on why does their fate remain up in the air. It is because there is not enough evidence to prove their existence. There are conspiracies surround aliens but no proof or an encounter with these beings.

Is this a question towards you? or a question your supposed to ask someone else.