I was thinking about this too. The Rangers had the #1 and #2 can't miss picks, played them straight out of the draft and they still can't figure it out. Neither has scored more than 20 goals or more than 40 points yet. Fans here and other sites rail on LA's development with certain players every day, but how do you explain what's happening in NY?
GBH's next sentence in your quote summarizes a point I have said many times.
The Rangers have had issues developing forwards. It's not a Kings exclusive issue.
But pay attention to this: "there is no one size fits all for development no matter what people here want you to believe."
I have said multiple times there are times variety is appropriate. But the Kings take the slow boil approach for all. Vilardi, Byfield, Kaliyev, Fagemo, JAD, etc ALL started out in the bottom-6 and had to play a certain way to earn more time.
So, rushing all players, or slow-cooking all players, is a flawed plan. Both the Rangers and Kings seem to follow their own rigid development plans with flawed results.