Silly because the two types of income are not fungible in my mind. With a job, I am a mercenary of my time and the income will dry up immediately if I decide to stop (let’s set aside the long tail effect of investing the savings). With a successful side project, it becomes a very passive income, like many people mentioned below.
Ultimately I guess I am genuinely jealous of people clawing back their own time, while I am working incredibly hard with life passing me by, that’s it.