He's currently tied for 98th in the league in 5v5 points.
As far as players on the PP go(another obvious requirement for the ranking), it's really low.
You use percentages to make certain points but abandon percentages when it's not convenient for your argument.
There are 700 players not playing goal who play in the NHL including call ups. That puts RNH in the top 14% of 5v5 points which seems pretty good no?
It's nonsensical to say he is not a good 5v5 player.
As for power play points, special teams are a critical part of how teams score and decide games more often than not. They are typically created from strong 5v5 play where the opponent has to be penalized to stop a 5v5 chance or advancement of the puck. (which is why offensive zone penalties drive coaches nuts)
Justin Bourne, an ex AHL player, the son of NYI legend Bobby Bourne and current analyst with a strong lean towards advanced stats recently did a piece deriding the advanced stats community for speaking poorly of power play points and he was 100% correct.
Power plays are often earned by strong 5v5 play, power points count, and decide many hockey games.