That's total bullshit. She was a music major in college, presumably some 20 or so years before her job at Equifax, and in the interim she had jobs at major banks and tech companies. People act like she was a musician until just before she plopped into Equifax.
Sundar Pichai majored in metallurgy engineering. How much of his college coursework do you think he uses day-to-day?
OP never said 'a tech job', it is implied it would make someone unqualified for a CISO job though. And as a general rule, I tend to agree.