We live in a society and the law is a reflection of it,
especially in cities where a lot of people with different
needs and desires have to get along. If you want to literally
do whatever you want on your property, there's lots of places
(in Alaska) that you can do that.
Firstly let me say that I agree with the latter part of your reply that less-dense places are ideal for the libertarian minded. I'm fully onboard that school of thought.
The problem emerges here: cities are increasingly becoming centers of cultural clout, if not political or economic clout. If you don't have some kind of foothold there or some grasp of the proceedings there -- and no matter what your cultural leanings are & whether you lean left of center or right of it -- the change will drift to your shores, no matter how remotely you live or work.
Every aspect of every issue that has been covered in this thread is somehow going to affect how you live, work & socialize, in the near future. Compartmentalizing yourself -- and I'm not saying you're implying that -- from this debate with the hopes of one day moving to the far reaches of the continental expanse, is definitely not the answer.
With increasing urbanization of the world, this applies to you, even if you plan to move to a sparsely populated patch in another continent. [1]
Most people don't think through this enough. I wish I could overstate this.
Cultural clout shapes large portions of your life. And cities are increasingly holding larger and larger chunks of that clout, even if they always have.
Every law stipulating the amount of bio-degradable plastic in the cutlery at your run of the mill chain restaurant to the maximum wattage legally allowed to power your domestic vacuum cleaner [2] is somehow fashioned in the cities or influenced by people who've lived with city folk their entire lives.
This is why cities matter.
And with that, how cities are fashioned with the input & desires of a small coterie of like-minded micro-apartment-dwelling, parklet-embracing & density-demanding people, can one day have far-flung consequences on a geographically & culturally removed set of people who've never ever bought a two way ticket at a metro train station kiosk or had to share traffic with a paratransit bus [3], on their countryside roadways.
I'm not even mentioning the political pressure large companies with thousands of employees have been able to brought to bear on entire states, let alone cities, to mold & influence laws.[4]
This is why we all have to partake in this, whether we could be bothered to do so or not. Because one day we will.
[1] http://www.un.org/en/development/desa/news/population/world-...
[2] http://www.sbs.com.au/news/thefeed/article/2016/06/23/wackie...
[3] https://en.wikipedia.org/wiki/Paratransit
[4] http://www.cbsnews.com/news/salesforce-ceo-marc-benioff-nort...
edit: errors & added a footnote