Precisely.

You don't "want" to stick to a vegan diet. You have a vegan diet.

The distinction is roughly, between a goal, and a plan.

A plan is something that you can immediately begin executing upon. That doesn't mean you won't falter, or that it has to be an on/off switch style revolution, but there's a clear set of things to do.

A goal is embryonic. You don't know how, or if, you can achieve it yet.

I am skeptical. Human desires are a thing, and I am going to continue to assume that there is a good reason they are a thing until I have a very detailed and very well tested explanation for why there is no harm in replacing all of my desires with plans.

I think I understand you. At a lower level, there is a very good reason why, during our teenage years, we develop our prefrontal cortex to moderate between our desires and our actions (and why for all of us, going from childlike "I see, I want, I do" to adult "I see, I want, I plan, I evaluate, I might do") is so traumatic.

That, or you've made a subtle joke which I'm not quite seeing :-)