Nope. If someone is willing to pay you for something you love to do, I say grab it by the horns! Who knows what kind of concept the director might have? Or how old one actually LOOKS on stage.
Have there been times as an audience member I felt as if someone was too old (or young) for a role? Sure, but I don't blame Chenoweth for playing Fran in Promises, Promises. (as an example that jumped to mind)
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.