Ball is kinda like the pharmaceutical companies; they are not going to recommend "off label" . . .
uses.
Canning jars are supposed to be heat/freeze treated, but what Ball is worried about is thermal shock, like when you put a room temperature (jar with pie stuff in it) into a 350º+ oven.
Chances are that they are not going to crack, and if any did crack/break, the others would be ok.