It's a feature and a bug. A bug because it doesn't take anywhere near half the country to block something or push it through. A vocal minority or well-funded politically connected group is all it takes. Refer back to my net neutrality example. Polls generally showed a significant majority of the public was in favor of net neutrality, I've seen polls peg it anywhere from 57% to 83%.

Popular policies around the issue created by legislative statute instead of agency rules would have been a lot harder to repeal.