The 650 rear wheel can be an absolute monster to re-install even in a nice clean, well-lit, comfortable shop as a few members can attest. Wrestling with it on the side of the road in heat, wind, cold, traffic whizzing by, and all that is not something anyone would fancy.
I suppose if one lives and rides mostly in cities and built up suburban areas it would be best to call your preferred recovery service.
For those of us who ride "out there" phone service is frequently absent.
This is why the supreme being gave us tubeless tires and good patch kits.