Unless I missed something, I don't think the guy was making any political statement, I think he was just doing a hipster thing. I thank God I live in a country where I can either go into a sandwich shop or by all the ingredients at the grocery store, all for a pittance and with a negligible time commitment.
I just thought it was an interesting process from the POV of TEOFWAWKI and I have a hankerin' for a sandwich. My dad always talks about how they grew all their own food on their farm in Germany. About the only things they bought at the store were sugar and salt. They took wheat to the miller and traded "X" bushels for "Y" kg of flour, but made their own butter, cheese, etc. and grew all their own meat, vegetables and fruit. They did some trading with neighbors, but otherwise food was work, and it required processing equipment as well.