Come on bignosemac, we don't normally see that kind of Daily Mail-style hyperbole from you!
Inattentiveness can kill, yes. However, it can also modestly inconvenience, which is what happened in this case. Once the driver has missed the station there's nothing anyone can do about the mistake (I'm assuming you wouldn't advocate an emergency brake application and setting back wrong-line to Didcot!) so it's up to Control to deal with the consequences. Which it sounds like they did very well in a difficult situation.
I don't know why you seem to have got the impression that it's regarded as an acceptable operational incident. The driver will be checked for "fitness" at the earliest opportunity, and assuming s/he is fit to continue will do so. Would you rather that the onward working of the service were cancelled for want of a driver, thereby causing far more inconvenience than the original incident?
Fact is, a "fail to call" done under clear signals endangers nobody and inconveniences some. We don't know the circumstances of the incident in question either - who's to say that there wasn't an error in the diagram the driver had on the desk? Whatever the case it's not a safety-related issue, although I have no doubt that if a particular driver made a habit of it then appropriate investigations would be made.