@CANDC
I my case it's slightly different. My dominant instrument is guitar and this instrument is fundamental part of the music I play. Even if my injury would allow playing a different instrument, I wouldn't be able to play the music I like. On guitar, I know ca. 170 songs. On piano (I can play that one too), I'd be able to play 3 of them and none of those is my favorite.

Mostly, I played covers of my favorite songs, composing is a different chapter.

When it comes to creating my own music, again, we face the problem of different instrument because on keyboard you can't play or record certain essential guitar techniques and figures. In addition, I use a very different recording style and I want to avoid using computer as much as possible. Also, I need to have the guitar in my hand to compose as I need to hear and play the idea immediately.
But what is worse, I have no idea what would be my inspiration. After all, I wouldn't be able to play the music if I made any and playing the tones is what I enjoy...