Paired with an obsessive work ethic in the studio.
If it's only obsession in the studio, things come out dry, uninspired. If there's no surge of energy running through your bones when making the music, why would anyone else feel anything? Mixing and the music sounding "professional" is completely secondary. Even detrimental a lot of the time, to be honest.
Applies to many other things than music as well. I don't any great technology comes out and about without that loop, either.
You get over the fear of writing by doing a LOT of it, until you get to a point where writing a story or blog post stops feeling "special" and becomes just another thing you do. Each individual piece of writing stops feeling like an important work of art that you must get right at any cost, and becomes more like doing the dishes or taking out the garbage.
You can then separate the act of creating from the act of curating and editing. I regularly cut thousands of words from my writing before I share in public. I regularly throw away (well, archive) fully written drafts because I don't like them. A few years ago, this would've been unimaginable. Today, it feels like part of the process.
At some point, you gain confidence that you'll always have another story, another blog post, another poem inside you. If the current thing sucks, you just write another thing, and another, and another, until something clicks. It's freeing.
IME when creative work starts feeling like "just a job" is EXACTLY when it also becomes most fulfilling and satisfying.
In the end, whatever works for you.
The joy of participating in music, to me, is one of the few domains where we can still, to an extent, hide away from the relentless enclosure and commodification of every facet of our existence in the name of capitalist value extraction. Imagining oneself as an assembly line in order to rush past the experience of the creative process and arrive as quickly as possible at a finished artifact — to me this is an act of submission. It is accepting that one's market value as a musician, as measured by the number and popularity of commodities they produce, is of vastly greater importance than the depth and quality of their musical experiences, than any joy, pleasure, satisfaction, connection, growth, expression, or catharsis they experience through their participation in music.
I have no doubt this is an effective way to end up with a bunch of finished tracks. But I can't help but feel that it is missing the point.
No further need to learn to play like these crazy guys: https://rochus-keller.ch/?p=973