Continued (my post was cut off): Click on the video about halfway down the page, titled "Driving Kills", and originally made by Copenhagenize.com as a visual What-if-car-companies-were-required-to-practice-truth-in-advertising spot.
On the other hand, if your question is really whether long distance touring is healthier than day rides or commuting, the correct answer might be "it depends".
It is my experience that if you don't manage your resources properly, both in and outside of your body, you won't be a long distance tourer for long. On the other hand, long distance touring teaches you a lot about your body (if you care to listen) and so you may start out doing many of the wrong things and end up managing your resources just fine. You probably want to use the same common sense though regarding the kind of food you consume that you try to use when you're home. I eat much as I do at home for all but one and sample the local fare during the one meal. I do carry some food bars with me for emergency rations but I really don't need them often.
Long distance touring also doesn't necessarily mean that you're riding from sun-up to sun-down, though if this is what floats your boat and you feel good doing it, by all means, go for it. When I tour, I'm not in a hurry. I prefer to ride for 5 hours or so and use the rest of my waking hours securing food and a shower, doing laundry, pitching my tent, visiting the library or local museum to charge my gadgets and learn about the local area and people, socializing (when possible), reading and so forth. So long-distance touring may look completely different for you than it looks for me (aside from that it keeps going for weeks or months on end). But just the fact that it keeps going doesn't in itself make it extreme or unhealthy.