I pretty much do that, every day. I write stuff that I want; whether or not anyone else does, and I don't really bother to don a sandwich board.
The one thing that I did for other folks, has taken off, but it took ten years. One reason was that I didn't spend a whole lot of time, tubthumping.
Short poems which I write on my phone, once in a month or two. A small utility that does something new and novel once in a couple of months, which is kept on my hard disk and never uploaded anywhere.
These are not enough for me to feel very creative. I try to limit my passive consumption of HN/tv/movies/dev news/games and keep my FOMO in check, but it's difficult.
HN is pretty much my only e-interaction with others (besides some Slack, Zoom, and messaging, for the project I'm implementing), which explains my rather voluminous activity, hereabouts.
It's a muscle, the more you use it the more you get of them. If you want more ideas you have to tease them out.
It's all good.