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A career in Information Security will lead to failures and setbacks. If you are not prepared for that reality please look at a different profession. Unfortunately, setbacks will be true of most professions so maybe stick around until the end of this short piece.
There will be days where you fail to demonstrate risk in a meaningful way. Those days will feel like bashing yourself in the head with the metaphorical hammer because “the risk is so obvious how anyone can not see this?” But I already gave you a potential answer. You failed to demonstrate risk in a meaningful way.