Not to start that all over again, but that’s debatable.
Agreed. A properly done rivet is heated, inserted in the hole and set. Once the head is formed, as it cools the shrinking shank tightens up the fit between the two pieces clamping them together. Heating in place has the effect you mentioned of not being able to upset the back side of the shank, as well as heating the surrounding metal, which then cools and shrinks along with the rivet, reducing the clamping force as well.
Deve's method maybe falls in the category of "adequate" and definitely not "best".
