Ahh ok I thought you were trying to make a literal argument rather than a logical one. In that case, yes he is wrong to assume he was being to aggressive in his position sizing. He could've had millions and that $2000 wouldn't have equal to 1% of his networth. Either way this guy had no idea what he was on about as 3% would still be too low to daytrade with just a $2000 account. The commissions would've taken most or all of his profits.
It sounds like your friend is a very talented trader. How dare some anonymous idiot reciting what he heard on the internet to a seasoned trader! es