It's less about who starts and more about the total minutes played. Green won't get all those minutes, but there are times when he's useful. That said, I'd rather Pop try and give him those situations. This is what the season is for. Learning.
The team was lacking 3 players in this game basically. Parker, Gino, Jackson. They were also in the 4th in 5 nights. They did pretty well for all those factors. Also, there is nothing stopping Pop from running Nando/Parker together with Parker as an off guard, which would take away some stuff from Thabo if he gets him run off screens.
Pop has more options this season with Nando getting better and of course Kawhi. The key to Green is limiting his ball handling, which will definitely lessen if the team is fully around.