Firing people is not the only answer to errors. It depends on the intent of the person. If the person was neglectful or that it is proven that the person was be

Firing people is not the only answer to errors. It depends on the intent of the person. If the person was neglectful or that it is proven that the person was being irreparably incompetent/lacking judgement, then sure. Likely, though, this is an error that is more reflexion of a problem in the UI and/or drill process, and investing resources in making sure these are improved would be a better way to prevent further mistakes.