the Rockets' analysis uses the NBA's own official interpretation of the officiating in that Game 7.
Seems like the NBA identified the missed calls and Houston just extrapolated the impact on scoring.
I'm not surprised. I hate the way Harden plays but he draws a lot of fouls referees don't call. It's akin to how those Riley's Knicks teams had that "if you foul every possession, refs can't call it every time", except only for a player. Yesterday there was some shocking stuff, on those Klay Thompson's close outs for example.
Complicated for the refs though - and the league itself. If they call the game by the law, Harden would probably average some 20 FTs per game. Or teams would start giving him more space and he'd average over 45 ppg. Where do you go from there?