Because Salvia made me not mostly witness "beings" (although it did that too) but it made me experience multiple dimensions of reality, in an extremely convincing way. Not just visually, or mentally, but physically as well.
I can think of no explanation for the Salvia experience except that it unlocks your brain to experience true alternate realities. You just can't imagine or preconceive the things that happen on a strong Salvia trip.
Also it cannot be simply delusions, because many many people experience a similar, very realistic and profound effect. There is even a goddess associated with Salvia, which I have experienced as well.
Some things are just too weird and real to completely deny.
Even Ayahuasca seemed like simple fantasy compared to Salvia Divinorum -- the truth that we cannot fully comprehend.
It's a real shame it's been banned in most of the western world now. It's also a real shame it became popular among kids and Miley Cyrus and people like that who gave it unneeded attention.
I'll find some seeds and grow my own. One day. The Salvia goddess is very welcoming to those who treat her with respect.
I never needed more than 5x Salvia though to break through... and smoked regular leaves most of the time. All this 20x, 40x and 60x extracts are what ruined it for everyone.
I have also "broken through" with DMT, which is mild and unrealistic in comparison with Salvia. I have also smoked DMT and Salvia at the same time, which was VERY interesting.
Imagine the DMT world being folded like an accordian and then turned into a flip-book, turned on it's head and transformed into an escalator of dimensions by the Salvia. It's rather clear which is the more powerful substance when you do them together