>For the vast majority of people, installing apps from third-party app stores like F-Droid requires them to enable “unknown sources”. Signal’s developers feel that normalizing this kind of behavior would be “a reversion back to the desktop security model” and that endorsing it through participation would be harmful. The only reason they distribute an APK outside of the Play Store is to reduce the harm of non-technical people installing fake apps instead.
I guess it somewhat makes sense that they're against the desktop model of app distribution, but IMO the phone model is not worth the added security. Signal may not have any problems as a messaging app, but both google and apple have some ridiculous rules that categories of apps have to comply with. In particular if you're an app for any sort of art community, prepare to tell your users to censor even mildly suggestive artwork, violent content, content dealing with drug use (even if not glorified), etc. That's not to speak of countless other limitations.
The desktop mode of distribution ain't so bad. at least you're still in charge of your own device