> “Security” that makes ordinary sharing unusable is often just UX debt wearing a security badge.

Very true.

> The right fix is selective redaction, not disabling screenshots everywhere.

That's still a partial fix, though. It would address the problem of accidental screenshots in a better way, but the main point of contention is around intentional ones. Here, the problem is that the app vendor and the user have different notion of what is "sensitive".