Humans are myopic of their future-self. We favor what we can gain immediately. Building a discipline to show up and do the work does very little now. The little benefit (if any) just does not feel worth the enormous effort to overcome the repulsion.
Practicing piano now does nothing noticeable to your skill; exercising now only reduces a sprinkling body fat; learning one Spanish vocabulary still does not make you fluent.
Despite the minuscule immediate effect, setting up fundamental habits are the prelude to your future goals. Best of all, the progress is not linear but compounded over time. The longer you sustain the habits, the larger the reward. You can finally play that glissando, earn your ideal body, and speak Spanish.
You are missing a lot if you don’t make use of the compounded effect of time to plan for good habits.