Sure, but I would still imagine there are people who would be willing to contribute to an open source project. It isn't just about looking nice, it's about functionality as well. Backing up your fan curves, smart learning, remote access, and seamless startup would all be welcome additions, for example.
I'm using SpeedFan at the moment and it takes a long time to initialize on startup. There isn't an option to "start minimized" either. It's 2018 and it's just strange that fan software hasn't progressed at all.