I agree, it's only 1 loss, acknowledge and move on.
But to offer an explanation from my perspective on why those losses are tough. As a fan, I see a team coming home off a 6-1 trip, facing the Phillies, and want to see a whoopin'. I want the players to want to put a whooping' on them for us. And then the players go out and drop a turd in the punch bowl.
We'll get them tonight.
They had a let down after the Boston/Toronto road trip as well. Philly had a let down after the Brewers as well. Philly still has some very good components and are far scarier than some want to believe.