Yes, I certainly understand. Most people wouldn't be concerned—and would be far more likely to use the technology if they could enable a feature like "You have $n new messages."
I propose it as an option, not a default.
I propose it as an option, not a default.
But you can appreciate that as part of risk assessment some people might have a valid reason to be concerned about leaking even that much information?
GCHQ / NSA are good at finding patterns in data, so a collection of "You have $n new messages!" notifications can provide insight into the organization of a group.