The main advantages touring cyclists have is our strangeness (to most people) and the fact that most people probably assume that we really don't have much worth stealing. And we really don't. Most thieves are looking for jewelry, pricey electronics or guns.
or alcohol.. Just a matter of opportunity for some folks. A friend of mine had some scotch lifted from a daybag on his kayak when he and I were down in a town getting food while paddling on a multiday trip on the CT river in VT. Somebody went through his bag on the deck and lifted the bottle. We did lock the kayaks together and the thief didn't appear to go through the hatches... but the bag on top of the deck was easy to get to and available and the boat launch was right off downtown..