I like your phrase, "I can simply walk, with a minimal house on my back." That is what it is, and nothing more, -backpacking's essential essence. That is not to say that you cannot launch out from that basic position into many different ancillary pursuits,

As an archaeologist, I found backpacking, and a certain amount of outdoor expertise, to be a useful work related skill. I also became an environmentalist of sorts over time, but it is by no means a necessary requirement. I also have had religious, or near religious experiences, while out and about.

I suppose that backpacking led to my involvement in SAR activities. Of all the things I have done in life, the time in SAR is that of which I am most proud.

Do learn to recognize the North Star - it could come in handy some day....