The implication of that question is nonsensical. Experian had/has many problems, but the fact that their chief security officer got a degree in music decades earlier wasn't one of them.
Some of the very best programmers I know were music majors - it's actually not uncommon at all. I mean, Steve Jobs only went to college for 1 semester, and afterwards he audited creative classes like calligraphy. Is the implication that he wasn't qualified to be CEO of Apple because he didn't have a degree in management?
You’ve managed to completely miss my point about attempting to blame an individual engineer backfiring and hitting senior management. No one would have cared what her degree was in otherwise. But it became a stick to beat the organisation with.