What do you mean when you say ‚remove or put in the barriers‘. Listener question

I have a question about today’s podcast (Friday 16th Sept)What you said is so true, I love it. The only thing not clear is what you mean when you say ‚remove or put in the barriers‘. I sounds to me like you need willpower and effort to do that. If we could just remove the barriers we would have done it long ago. My personal experience with food and exercise and substances is, when you fully feel the effects it has on the system the behavior changes by itself over time. You don’t have to remove or put in anything, you just do it or don’t do it anymore. Happened to me with several things from alcohol to fast food to other substances. Is that what you mean by removing the barriers or something else? I would love to hear a clarification. Thank you for reading 🙏