Such mindset can bring disaster to a trader's account. It is true that the more risk one takes the higher the return. But what happens when one loses few consecutive trades? They fall in certain situation from which they may not be able to recover.
It seems that he don't think so much about losing money but i'm sure for someone who suffer consecutive losses and not in small amount will never forget how hurt it is. With better approach someone can lower the rate of losses and one of those approaches is "less is more", trying to earn smaller but still keep expanding is a good choice.