I think the key here that people often desire and even fantasize about that which they don't have. A little bit of the grass is greener syndrome here as well.

The lesson I think to learn is to be true to yourself and try and be objective when assessing life. I grew up in extremely rural, a very nature heavy childhood and there are parts of it I believe are fantastic. Meanwhile as I grew older, I found there were things denser populated urban centers could offer me. Every now and then I look back nostalically about how simple life was but there were a lot of tradeoffs in that context I wouldn't just get rid of now.

For me the compromise is to find a moderately densely populated area with access to densely populated resources. I have most all the access to nature quiet and sanity where I live, meanwhile within a 15 minute drive I can do most everything one has access to in say LA or NYC as far as things I care about and am interested in.

As with many things in life, I don't think the extremes are where happiness tends to lie, it's some compromise or mixture in between.