> “The government knows how to segregate us properly”
The government is great place to balance competing interests, especially if it's more democratic.
> And “Everything will be cheaper by limiting people the ability to trade”
That's missing the point. The goal with regulations like these isn't to make things "cheaper," but to control negative externalities. There's more to life than the price of goods.
Unfortunately, prices are easy to quantify and that fact irresistibly draws certain kinds of people blind themselves to all non-quantitative observations and engage in the McNamara fallacy.