See, in reality, sometimes dissent is correct and sometimes it's wrong. I'm fine with either being put into a cartoon or anything else. But when you had the stereotypical complainer that was ALWAYS wrong, it's just so pathetically predictable what's going to happen. So yeah, I won't shed tears at the demise.
Getting along with with others is surely important, but that sure doesn't mean conformity. I think the problem was that you had dissenters like Brainy Smurf that were arrogant and above all ANNOYING. Good writing would have honest disagreements and make a story out of the different points of view.
Two examples. In one episode of Gargoyles Goliath absolutely refuses to abandon the castle to Xanatos, and the clan is supposed to follow the wishes of the leader. But Elisa and Hudson eventually make him see reason, which started with Elisa convincing Hudson that the clan couldn't afford to just blindly obey Goliath on this one.
In X Men: TAS, Charles Xavier wanted to try rehabilitating Sabertooth at one point. Wolverine fiercely objected but was just dismissed as letting his grudges and anger get in the way--he does have a temper, after all. Nobody else really agreed with Logan, either. However it is eventually revealed that Sabertooth was never sincere, and Logan ends up getting hurt while putting a stop to his rampage within the X-Men's mansion. The point of the whole thing is that Xavier's intentions were noble but at the same time he was blowing off Logan's concerns as unimportant when they should have been taken seriously.