It's not in society's interests, but it is in government's interests. Society and government are orthogonal teams who often conflict with each other. In the US, we spelled that out explicitly in the late 1700s, but docs go back at least as far as the Magna Carta.
Alas, "spelling out" government limitations isn't the same thing as believing limits are a good idea and enforcing them, as we're occasionally reminded. The Constitution is just ink on a page, until people give a fuck about it. And in America, the constitution is currently very unpopular. Society wants to surrender to government, or if it doesn't want that, it's sure acting like it wants that.