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Specifically in that story, Redwait had 2 serious arguments - the absence of a direct prohibition in the rules (even though the bug was known) and unofficial permission from 2 members of the administration.
In such a situation, refusing to use the bug could result in post-game comments like "well, you're a fool, you missed an easy victory."
To put it simply, I don't know if your brilliant mind will understand this phrase: "In that situation, I wouldn't even think about using this bug, because it wouldn't occur to me."
Added 1 minute ago
It's interesting, why do you think that your perception of the world is more adequate?
Added 3 minutes ago
The heroic tradition is that bugs are considered features until they are prohibited at the level of the rules. That is, you can use it once, but not anymore.
P.S.
I'm not discussing Redwait's actions now, but specifically the opinion of a possible future judge!