This article makes the mistake of equating the "cash value of time" with the real value of time.

If you're Warren Buffett, a dollar when you were 20 years old could have been worth $10m now. If you're building a startup, saving every penny you can on ramen noodles might give you an extra month you can survive with no funds. Thinking "I'm worth so much more than this" because you could be charging $100 an hour for Java development to some enterprise while you're coding The Next Big Thing is a disconnect.

Time has no cash value. Productive output has cash value.