That is what they want you to believe because of the money involved.

Anyone who says you need someone in between you and the divine is a charlatan and a fraud or just totally ignorant. See religions.

I have done DMT, including as ayahuasca brews over 200 times. Alone.

And when you start using words like sacred, holy, blahblah, it shows you need a lot to learn. Those are dogma words to control and manipulate.

Also, if you 'see' or 'experience' people you know in your trips or events in this human life and connect the things you see with that, it means you are too much involved with your ego, the human, which means nothing in the bigger picture.