All true statements. However, it's conceptually easier to grasp the impact of 3% of my time when I think about what I can or cannot accomplish in a 1.5 week per

All true statements. However, it's conceptually easier to grasp the impact of 3% of my time when I think about what I can or cannot accomplish in a 1.5 week period, rather than a 15 minute period. Some 15 minutes are jam-packed with productivity, while others are a coffee break, so I don't really understand what 15 minutes of my time is worth. Whereas, each work week is nearer to my average productivity, and I have a much clearer idea of what that's worth in terms of work output. If a person reads this "if you do the math" reasoning and has a different reaction to the same cost depending on how it's presented, then, wasn't it a good thing that the reader was given a variety of ways to think about the cost? (Since, necessarily, the reader's reaction to at least one of the presentations was incorrect.)