A huge number of users trust (right now) their privacy and security to systems that are no longer safe.
For example, how does a user know that their favorite safe messenger app has been hacked? The fact is, they will never know, all the while continuing to trust the security of the system.
Even if a user has not been compromised now, it's inevitable that they will be in the future.
As it stands, all current systems will be compromised thanks to the approaching Quantum Computing Era. As soon as quantum computers reach the mainstream, even the best security system will become meaningless.
No one is certain when this revolution will arrive - a few years from now, or perhaps much sooner - but when the day comes, people will be in a panic looking for replacement services that are secured against quantum computing.