I agree with you, but I'm probably biased because I've used live coding in one of my talks. However, the intent of coding live was similar to the talk you menti

I agree with you, but I'm probably biased because I've used live coding in one of my talks. However, the intent of coding live was similar to the talk you mentioned - it was to show people that what I was trying to accomplish isn't as hard as people think it is. In fact, it's easy enough that I can do it in an hour while explaining out loud what's happening.