It is one of the things that turned me off of a Hellenic Reconstructionist group that I found on line.
Yes, there are some things that are pretty far out there, like claiming that The Morrigan came to you to cheer you in your darkest hour. (That’s an actual line found on a Face Book meme. I cannot make this stuff up.)
(And, frankly, if your darkest hour is dark enough that the Morrigan is able to cheer you up, I’m going to make sure that you, me, and sharp objects are never in the same place at the same time…)
Unlike the Hellenic Reconstructionist group, I think that UPG is fine.
I’m not saying that what you learn in meditation is the answer for everyone, but it might be the answer for you. And if it works for you, then by all means, use it.
After all, at some point, everything we know about the deities was UPG. No one has any way of really knowing for a fact what they are like, although we can know them on an emotional and spiritual level.
Anything other than that is just UPG that was agreed upon by a bunch of other people and preserved through history.
But I’m still not sure that the Morrigan brings cheer…