That is not so black and white.
As you can immagine, bugs are not really so easy to partition. Consider a reporter or beta tester reporting a bug on component A which is open, but further analysys showing that it belongs to component B, which is closed. What happens to the bug? does it disappear? does it get closed till component B is published as well?
Or, even worse, bug in component X, from a previous sw release is obsoleted by the fact that component X is going to be dropped/replaced but that is not public yet. What should we do?
Especially considering the tight schedules we are already required to cope with, I am not going to ask the people working for me to take the extra effort of self censor themselves while trying to do PR with the community and simultaneously not ruining the marketing strategy. It's not their job and I don't see why they should take this unnecessary risk upon themselves.
Once we can speak freely about everything, we'll try to do it.