From the article:

It’s difficult not to form the impression that if Trump is unconcerned with the criticism that he faces conflicts, it’s because he simply doesn’t see these interests as conflicting. If his experience in Scotland convinced him of the dangers of wind farms, wouldn’t it be wrong not to apply that lesson more broadly? If his businesses thrive in India, doesn’t that strengthen his reputation and relationships with a key ally? If he’s polite to his partners, and loyal to his friends, isn’t that what Americans expect of their leaders? Isn’t everyone better off, when the incentives all align?

Trump is correct when he says that the president is exempt from conflict-of-interest rules. Even the Emoluments Clause of the Constitution may not apply to him.

There's never been a situation like Trump's before. Washington and Kennedy were very wealthy, but neither was head and principal owner of a gigantic worldwide private conglomerate with hundreds of pieces.