>>211588913
Everyone else's answer is retarded. Let me explain the real logic behind Netero's actions.
Netero already accomplished his goal, which is a battle with the strongest being, the moment Meruem agreed to fight him. Any obligation he feels towards humanity/the greater good is also satisfied because he knows that he has a bomb in his chest, and that Meruem is never leaving the battlefield alive. He's already achieved everything he wants, and any further interference he gives will have nothing to do with his goals.
Gon has not accomplished what he wants. His goal is different from Netero's (a good fight), as well as Morel and the other hunters(defeating the ants to protect humanity). Gon's goal is revenge against Neferpitou for the enslavement of Kite, at any cost. Being a hunter is all about seeking the thing you want, even when it's selfish, and as the head of the Hunter's Association, Netero respects Gon's drive to accomplish his selfish desire. Netero likes Gon, and because Gon exhibits a lot of qualities Netero respects, so Netero points Gon to the place his hated enemy is at, at the time when that enemy is most vulnerable.
Obviously, within the story, Gon going off the deep end, taking Komugi hostage, and throwing his life away is framed as a bad end. But Netero is a hunter and is beyond such petty moralisms. He respects people who pursue what they want, and would view Gon's fate as the natural consequence of Gon's choices. At the same time, Killua tries to protect Gon from his own instincts. The reader is left uncertain whether or not Gon is a victim by the arc's end. The tension between Hunters as selfish adventurers, and Hunters who feel responsibility towards humanity and morality, is part of what makes the series so great.
