Oh wow, it's possible for two groups to perform completely differently, that's not shocking news at all. It also doesn't change the fact that this event sucks. Talk about skill and gear all you want all day long, NNI is still going to suck. You even admitted in your post that it's not skill based, yet you try and defend it by saying that it takes skill, but I'd be willing to wager that your hypothesis is completely false and the only reason anybody wins is due to the RNG not turning any given run into a hot mess. The sole contributing factor to victory in NNI is damage output, and it doesn't take much brain power to press a few buttons or set up a WS macro.
Skill is threading the needle with a pet that paths like an overweight autistic child with bowlegs, running through empty rooms and beating down lone mobs while occasionally pressing a button in sequence with other people is not. This event is still terrible, by the way.