Yeah... Does it support WhatsApp? If not that's a deal-breaker in most of the world.
Sell a way for businesses to send trusted communications to their customers in sensitive industries - i.e. healthcare would be a big one.
They need both an actual revenue stream, but also that sort of professional messaging can drive adoption which ultimately furthers the Signal mission.
Plus all those things could desperately use good secure messaging systems.
Meta only bought it after it was already the de facto standard. And to be fair they are only just starting to ruin it after quite a few years. So I would say the world made a pretty good decision there.
Much of the love was built before Facebook took it over.
So, yes, it's possible :)