That's correct. I certainly am not pretending to speak for all consumers in all situations, which is why I stated it can matter.
My primary point was that since it can matter, the information should be presented. An underlying assumption being that it can't hurt, but could help.
However, you brought up a point I hadn't fully considered : namely that this information could be directly confusing to some users and by extension undermine their faith in their service provider.
That said, I think the sample error message in the OP is sufficiently clear for the broad spectrum of users. Therefore, I believe presenting users with that message, or something similar, would do more good than harm.
My primary point was that since it can matter, the information should be presented. An underlying assumption being that it can't hurt, but could help.
However, you brought up a point I hadn't fully considered : namely that this information could be directly confusing to some users and by extension undermine their faith in their service provider.
That said, I think the sample error message in the OP is sufficiently clear for the broad spectrum of users. Therefore, I believe presenting users with that message, or something similar, would do more good than harm.