Yes, if you consider the deaths of forced labor in the concentration camps (camps like Mittelbau-Dora). That forced slave labor at the Dora concentration camp for example was used to build many of the V2/A4 rocket components and assemble them, and of the estimated 60,000 forced laborers enslaved at Dora, only about 20,000 (1/3rd) had survived the ordeal by the time the camp was liberated in April of 1945. It is estimated about 12-15,000 of those victims had been assigned to be worked to death producing the V1 "flying bomb" and V2/A4 rocket program hardware there.

Conversely, it is estimated that "only" about 9,000 allied military personnel and civilians were ever killed by the V2/A4 rocket strikes throughout the course of the war (about 7,250 of those victims were in England).

So, it is certainly accurate to say that absolutely more people died in the creation of the V2 rockets than were killed by them when they were actually fired off in anger by the Germans.