Functionally, it’s the default because links do open in it, but why isn’t it able to tell that it’s already set?

No, I wouldn’t. It’s how I can tell if the setting actually took!

Maybe you checked “stop asking”?

Well that’s frustrating. I may need to check that again.

They always seem to have some critical limitation. Handbrake is too slow via flatpak to work. Flatpak Zoom had no camera access. Flatpak-only Zen browser can’t use passkeys. Zen browser asks to be my default browser every time I open it, even though it is and I always say yes; is this a flatpak limitation? I don’t know, and I’d prefer not to have to figure it out just for some theoretical benefits and more overhead.