No, a lack of monitoring cost you $10K. Your app was throwing a database exception and nobody was alerted that this was not only happening, but happening continuously and in large volumes. Such an alert would have made this a 5-minute investigation rather than 5 days.
If you haven't fixed that alerting deficiency, then you haven't really fixed anything.
If you haven't fixed that alerting deficiency, then you haven't really fixed anything.