If you wouldn’t accept that excuse from a teammate, don’t accept it from yourself.

You already have a working standard, you just apply it in one direction. Picture somebody else offering the same reason for the same lapse and your judgement arrives instantly, because from the outside you see only what they did and none of the reasons they have for it. That instant judgement is the standard you actually hold.

Use it as a test rather than a telling-off. When your reason arrives, put it in a teammate’s mouth and listen. If you would not take it from them, do the thing instead of finishing the sentence.