How many SFs are equipped to play point forward? Why are you making anomalies at the position's history a standard?
That position is primarily for scorers yet you want Melo to play Pip, Bron, Bird rather than Gervin, English, King, Dantley, Aguirre, Erving, Worthy, Pierce etc it's always been.

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Are you talking only SFs or PFs too?
Paul George, Lebron, Durant, Blake, Draymomd Green, Chris Webber, Andre Iguadala, Gordon Hayward, Kevin Garnett, Pippen, Tracy McGrady, Magic Johnson (You know damn well he'd be a SF), etc.
All those guys are dudes who can handle the rock, create for others, and can pretty much be a secondary point guard if need be.