The guy's insinuation that your achievements were fueled by chemicals is wrong. I know many people who developed their willpower, made a decision and did something, no chemicals involved. I myself don't depend on (or even enjoy) caffeine or even sugar to get stuff done. I get it done better when I enjoy it. Often the trick is to start doing something small where it's safe to fail ... and as you start doing it, you get more ideas and soon you're in the zone.

Russians have a saying: appetite comes when you start eating.

PS: Also, he writes "I don't make spelling / grammar mistakes" soon after writing:

There’s no doubt that I’d rather surround myself with go-getters who say what they do and never take yes for a reason why not.

Ugh.