No, there's much more to it. Just more of a random thought than anything. I heard someone - maybe it was Bob and FP - talking about the Nats less-than-stellar record in day games and getaway games and that's usually when we see Lobaton start. But that's also when Dusty rests many of his regulars.
Lobaton has had 22 starts and 8 of them have been catching Roark. 2 others were catching Turner and 2 more catching Ross. That's over 50% with crap on the mound, unless you blame him for them being crap (which you probably do
).