Alot of the ealier suttas contain not only references to Devas, but even many dialogues with them. Considering how we are able to place much faith in the Buddha's words (as recorded in the suttas) in regard to even loftier matters, why not with regards to this?
Some moles cannot see light. That doesn't mean light doesn't exist. But if moles could speak and understand our language, and if we tried to explain 'light' to them, they would just be puzzled, and claim we are talking nonsense. They would probably say, "there's only (this) darkness, everyone knows that!" or something like that. Similarly, most human beings can't perceive the higher, heavenly realms, but that doesn't mean they're not there.
The suttas seem to be right when it comes to so many other things, maybe they are right about this one, too?
Then the Blessed One, picking up a tiny bit of dust with the tip of his fingernail, said to the monk, "There isn't even this much form...feeling...
perception...fabrications...consciousness that is constant, lasting, eternal, not subject to change, that will stay just as it is as long as eternity."