Some call it “ascension” because they feel becoming something other than human in soul is such, but honestly it’s not but one could call it that, ascension without all the over fantasized bits.
the benefits are different per individual, my friend who got a transmutation from Inari did it so he could have a community to be apart of when he projects, work his way through her tribe of kitsune’s ranks and such.
The etheric/Spiritual isn’t all love and light, it’s a harsh place and some people want to have somewhere to go when they pass on and not want to reincarnate. Others want to build long existing bonds in this life that last until this life is over.
Reincarnating into a say a demon after this life is very probable but it’s not the same as building long lasting bonds from this life and on, you’d have to literally wait til this life is over, die, reincarnate into a hopefully not shitty demon life, grow up, make bonds, which is a longer task? start now or wait however many years til you die and start in the next life?
I tested out the concept of the soul being what it’s meant to be or not, by that I went through a transmutation once before to a shadow being with the help of Nyx, however it did go through but after a while my soul started to slowly revert back to what my soul is.
I don’t have a strong purpose here but it reverted back because I came here out of curiosity to see and learn some things about this place which may or may not be able to apply to my spiritual life (which in projection it actually has)