Unenlightened people unknowingly have funny reality-distortion glasses on their face without realizing it.
Spiritual practice or even an accident can knock those glasses off, and that’s enlightenment and then you see actual reality.
So you don’t need to add anything to reach enlightenment. You just need to let go of illusions (those reality-distorting glasses).
Rationally believing “everyone’s already enlightened” doesn’t help much so long as you still have those reality-distorting glasses on your face.
Knowing that you have reality-distorting glasses on your face is partially helpful, but it’s not the same as taking off those glasses through spiritual practice.

