Doing Landmark Forums and advanced courses has fallout. Members change their lives dramatically, often destructively to those close to them.
Weber says everything is peeled away until there is nothing. Therefore there is no truth but only multiple interpretations, an infinite array of possibilities. Life can be constructed anew. History is bunk.
If this is so and you don't like something, get rid of it. We know anecdotally that members have divorced, quit jobs, left families, and more after doing Landmark courses. They are on a high where anything is possible. We also know that oftentimes they come down and wonder what the hell they've done with their lives.
They've been brainwashed. And they are left bereft.
I have an interest because my wife decided that her possibility was to divorce me because she had not been honest with me in our relationship. I have to live with aftershock. I still am.