When I was 14 I purchased a CD with a copy of the Audacity installer on it from a shady site for $30...

I seriously doubt the authors intend you to uninstall your keyboard every time you need to write a work email; it's to stop you from profiting off of their work, just as you can't remove their branding and funding links when you re-distribute.

I have CC BY-NC images as my desktop wallpaper on my work laptop... Now if my work was selling the laptop then it could become a problem, especially if the pretty art was part of the value proposition. While it merely existing might be a gray area under some hyper-pedantic interpretation, it's functionally irrelevant in the real world until there's money involved and the licensor can show damages.

(Psst I also changed some behaviour in my GPL editor for personal use once without sharing my changes and also I also used that version a few times while writing proprietary commercial code... Pls don't tell Stallman)