I agree and use a CC as well. However, humans spend more money when using plastic than they would when they use cash. Because the physical handing over of cash causes negative emotions in our brain. That's why he hates CC's
I'll have to pay attention to if I feel any negative emotions when I use cash. I suppose it can create anxiety if something comes up.
I find it to be a bit invigorating as it makes me purchase by need and feel good about budgeting.