It depends. It means I live in an area where I have a lot of other freedoms. I can go build a shed and nobody is gonna ask me about a permit. I can plant a garden or put up a fence and my neighbors aren't gonna complain to an HOA about how it looks. And I have the freedom to drive to places much further away and leave whenever I feel like it instead of working around somebody else's schedule.
There are trade offs for every way of living, but it would be nice to have "something" around here as an option.
Yes, it's exactly that black and white. The southern states explicitly cited slavery as their reason for secession, it wasn't some afterthought or side benefit.
You can read their letters here: https://www.battlefields.org/learn/primary-sources/declaration-causes-seceding-states