He didn't fire Warnock. You know, the man who's press conference the day before the Wigan game centred on his contract, or rather him not being given a new one.
Sacking Wilson was a mistake, appointing Robson, not letting Blackwell go after the PO final was a mistake, appointing Adams was a mistake as was Weir and the Clough sacking was a shambles even though quite a few thought it was a decent appointment although not as many who congratulated him on appointing Adkins.
But now Wilder is a luck appointment seemingly only good luck applies to McCabes decisions not bad.
As for the law of averages in this matter....
"As invoked in everyday life, the "law" usually reflects wishful thinking or a poor understanding of
statistics rather than any mathematical principle. While there is a real
theorem that a random variable will reflect its underlying probability over a very large sample, the law of averages typically assumes that unnatural short-term "balance" must occur.
[1]Typical applications of the law also generally assume no
bias in the underlying probability distribution, which is frequently at odds with the
empirical evidence."