Every perfectionism course you have encountered has made the same category error: it has treated perfectionism as a behaviour to modify. Try less hard. Finish before you're ready. Tolerate imperfection. These instructions treat perfectionism as a surface pattern — a set of actions that, if adjusted, would resolve the underlying condition. They don't. They can't. Because perfectionism is not a behaviour. It is a belief system. Specifically, it is the belief that completion is possible and that your worth depends on achieving it.
This course does not offer you better strategies for tolerating imperfection. It offers you something the other courses don't: a complete dismantling of the premise that makes perfectionism make sense. By the time you have finished the first module, perfectionism will not feel like a habit you are trying to break. It will feel like a confusion you have begun to clear up. That is a different experience. And it leads somewhere the behaviour approaches cannot reach.