Why is it that some lack the discipline to just do things that they want to do? Because levels of motivation matter. A lot of times, people want to have things

Why is it that some lack the discipline to just do things that they want to do? Because levels of motivation matter. A lot of times, people want to have things, not necessarily make them; it's the difference between being interested vs driven to do something. E.g. A person wanting and daydreaming about having a wooden scale model yacht may want to design it but not actually want go through the building process. There is also the issue of discipline and temperament: A person driven by nautical design or related toys may not go far if they often lack the discipline to finish what they start and/or get bored easily. Ultimately, successful side-projects require a combination of factors, not just desire.