TBH...I never desired to be all those things, it's just how it evolved over time.
My initial goal was to write some songs, and just thought it was cool to also create some home demos...which is what they use to be called back in the early days of home recording, when all we had was 4-track tape decks and an 8 channel mixer, with some processing if we were lucky, but back then, there were not too many products aimed at the home recording folks. You had instruments for players...live/gigging/jamming/home musicians...and you had pro studios.
So in those early days, if you had a small "consumer" grade recording rig, it was just to churn out some demos, and send them out, and hope to one day get into a pro studio to record your music.
Now it's about wearing a bunch of hats, and trying to emulate a pro studio in the home environment, for many folks.
Going back to my early days, because I wasn't thinking much about editing/mixing/mastering...the best part about it was tracking, which is still my favorite part.
You have that basic production plan, some overall ideas, and then during tracking you get to flush out the song as the tracks start to add up and you're finally hearing what you were only imagining in your head.
I don't dislike the editing (well, maybe more than anything else), or the mixing (sometimes when it's just not coming together) or the mastering (which is still more about experimenting and learning than just doing it)....but I would be happy to just track and let the rest go to someone else.
I think it's because during tracking, I am still in the process of creating the song. Yeah, it's written and arranged for the most part, but tracking often also becomes an extension of that...it's where you can really define the song and how it sounds...though these days, a lot of people think all that is supposed to happen during the editing/mixing/mastering, and so tracking is like just to get anything down, and then worry about getting what you want later.
Also...because of those early 4-track days and limited post-tracking options...you're production needed to mostly happen during the tracking stage, and the writing and arranging also had to be pretty much set.
I don't dislike the option of creating in the computer, so to speak...taking rough bits-n-pieces of record parts and then using the power of the DAW to make them into something...but that can be often tedious and a drawn out process. I love the approach of going for something more specific at that tracking stage...and for me, since I still use tape to track to, just like in the early days...though now I've got the big 24 track machine...even though I know I can "massage" the tracks later in the DAW...I still try to make them as complete takes as possible, as if I was going to mix them right from the tape deck...so they have to be pretty close to what I want.