If you’ve ever tried managing your own finances in a seriously methodical manner, for example, and you should, then using Excel or alternative spreadsheet software simply would be inevitable. Are you saying that managing your own finances is not an important life skill, let alone a chore? Should anyone be proud at all that they don’t? Heck, she has achieved some success as an artist so she must have money to manage and understand. Even rich people who have businesses to run must deal with Excel on a regular basis, because not doing so is gross neglect and can have serious consequences, both financially and legally.
I don’t understand why you’re so hellbent on defending ignorance, to be honest. If you’re not aware, you should know that you went a really long way to defend not knowing Excel, to think that for Kelly Rowland herself, I only criticised her tone.