Perhaps words are confusing things. Instead of "working harder" let's say "working more". For some people what they're doing is not work. There are plenty of pe

Perhaps words are confusing things. Instead of "working harder" let's say "working more". For some people what they're doing is not work. There are plenty of people who can work on something they enjoy almost every waking hour for 10 years on end. Burn out is a non-issue. So if you intend to compete an a business or field for which the bar is that high, and you don't really love what you're doing, you may be in trouble.