Actually you may be able to, and this was one of the central tenets of the way that delay attribution works.
Yes, these events happen, but one of the key aspects is that then, after it is dealt with on the spot, how long does it take for the service to recover. Long-serving operators will tell you that it does take so much longer to recover from an event nowadays than from the same sort of happenings a generation ago. And indeed, one of the reasons why PPM expectations are not set at 100% is the recognition that there are some of these events which do arise outside your control. So the expectation is set at 95%. But then (simplifying) some beancounter works out that if you get rid of all the spare/standby crews and their costs, you would still, just, make the 95%, so they do so. Then the signalbox gets struck by lightning, and because there is no slack in the crewing any more they are then disrupted all day long, and then bleat "nuffin' under my control, guv".
But it could be.