True, but I'm pretty sure theres enough die-hard german iron aficionados who'd still take it up regardless. 
A few .30s aren't going to save anyone being chased by a fighter, but then again neither would being 60mph faster. 
EDIT: Matter of fact I think a more common defensive technique would be to use the slower speed to try and get the con to auger. 
60mph faster buys you time and perhaps a friendly will be able to intervene.
Both are sitting ducks.
As to the German fans, as I said, it is a choice and thus would be a nice addition. When people ask for armed, 280mph Italian bombers that were also troop transports, well, that isn't a choice, it is just flat out better in all ways.