Stage hypnosis isn't therapy. Here's the difference.

Same word, completely different thing

The reason hypnotherapy has a PR problem is that most people's only reference is a guy in a sparkly vest making their cousin cluck like a chicken at a county fair. I get it. That looks ridiculous and it should, because it's entertainment, not medicine.

Stage hypnosis and clinical hypnotherapy share one mechanism, focused absorption, and almost nothing else. The goals are different. The training is different. The ethics are different. The outcomes are different.

Four actual differences

1. Selection. Stage hypnotists pick the most suggestible 10-15% of the audience because those are the people who make the show work. Hypnotic susceptibility isn't evenly distributed (see the Stanford Hypnotic Susceptibility Scale research for the classic data). A clinical session has to work for everyone, including the person who's convinced it won't work on them.
2. Depth. Stage routines use a very light trance because depth doesn't matter, compliance does. Clinical work aims for somnambulistic depth where suggestions can actually reach the subconscious.
3. Content. A stage suggestion is "when I snap, you'll forget your name." A clinical suggestion is "when you notice the urge to smoke, your hand reaches for water instead." One is a party trick. The other is trying to install a new default.
4. Follow-through. Stage shows end when you wake up. Clinical work uses between-session practice, self-reinforcement, and feedback. The session is maybe 15% of the actual intervention.