A position of power in an organization like Hunters might be a bitch unless your interests lie there, like the Rat's obviously do. Adventurers like to do whatever they want and seek whatever they fancy, but the boss of Hunters is tasked with maintaining the organization both internally and externally. Hunters enjoy some nice benefits possibly from all the countries, and that won't continue unless they do something in return as well. Netero had to with the ant question, no matter how he might have felt personally.