alt Hacker NewsIf you think your dissenting opinions should be popular, your opinions probably aren't all that dissenting. This person's dissenting meta-opinion is unpopular, it's still there and it's still being discussed. Discomfort is inherent in dissent, it's not people putting a lot of likes on your NormanRockwellFourFreedomsPainting.gif.
It's not that they need to be popular, it's that voting them down leads them to be dropped off from view (and makes it less likely dissenting views will be shared). Reddit is the extreme case of this where anything outside the majority group consensus is heresy to be voted down/hidden/banned.
Better sites don't do this and have in-good-faith discussion despite disagreement.