I'm curious about the things they did, but not because I think any of it was "beneficial". Or even "therapeutic." It's a morbid fascination, not something I'm taking notes on so that I can give it a whirl myself. I have an MA in Religious Experience and my master's thesis was on Attaining Religious Ecpxerience Through Ritualistic Practices in Modern Cults. It's just interesting. I think the various documentaries, news specials, podcasts, series, TV episodes, and books have done a fine job in spelling out the fact, despite seemingly positive short-term benefits, the methods were pretty fucked up.

If a series is going to spend ample time across multiple episodes talking about "techniques" then I think it's pretty natural to wonder what said techniques were. It doesn't mean you want to try them.