You're the owner of aspects like responsibility and risk but not the owner of aspects related to financial growth (I mean, your stock options are, but that's about it).
Doing what you think is right, is not necessarily the right thing to do. This is why there is also "Disagree and Commit". There are many facets to this and I am 100% sure that you did not get fired for >correctly< telling customers... You could potentially get fired for incorrectly telling them though, if the issue was severe enough.
Firing me for correctly telling customers that their services are down is not my idea of making me an owner.