This post is excellent -- and so timely for me! I've spent a lot of time recently trying to decide how I want to focus my time and energy as a writer, and I have to admit that part of that was spent questioning whether Steemit was worth it. But after going through the same questions you've listed above, I've decided it is.

That said, I don't think anyone should feel guilty about changing or giving up on goals if they no longer feel like those goals are right for them -- https://steemit.com/writing/@redhens/is-it-ever-okay-to-give-up-on-a-goal.