Sounds more like a simple statement of fact to me.
If Lubitz had been a F/O on, say, a Lufthansa 747-8F and flown it into the same mountain, he would at most have killed a handful of people.
Actually, there are 2 parts to his assertion, and only one of them MIGHT come close to fact:
It is a rare event that there are only 2 pilots in a freighter, the loss of life is minimal
The first, regarding a "rare event", is certainly false. There are MANY freighters flying around with only 2 pilots. There are also some (though a diminishing number) flying around with only 1 pilot.
The second, regarding loss of life, could be considered as partially true, based solely on past events. However, it cannot be considered true in general, because a freighter could well crash in a populated area. We have been fortunate that all such crashes to date have been in unpopulated areas, though it is easy to extrapolate what could have happened if UPS 6 had crashed closer to DXB, in the city...