They may not be brings but they are presenting a facade in the appearance/form of beings.
Have you read much on this subject?
I’ve been reading on it for about 60 years.
If you immerse yourself in the accounts of these ‘encounters’, decades and even centuries! of them, many of them have a DEFINITE dreamlike quality.
I think most are probably closely related to dreams - another example of Vallee’s ‘control system’, which he has likened to a kind of ‘thermostat’.
And Carl Jung has said that dreams, even if we don’t understand them at all {I suspect even if we don’t recall them} are still doing their important ‘work’ inside of us.