I agree on the comfort thing, but I think you're underestimating how much fun writing music is in itself. Same with learning an instrument, especially if you're playing with other people - it's more akin to getting fit playing 5-a-side than getting fit on your own on a treadmillSeeking comfort is a dead end, I think. Life can be richer with challenges.
Trying to write a song or a short story. We stick with it, because we know/hope it will be rewarding.