The difference is we know what protections were called and what every guy should do on every play. PFF for all the good they do, watch film and infer who did what. There is a huge difference.
Remember they didn't say his run blocking was great just passing.
James Dator got all pissy over this on twitter and was like "Derp. BUT PFF!!11!!"
So I told him just like you that PFF has incomplete data.
He said "You just don't understand the process"
Anyway, it reduced down to a pissing contest, so I guess my point, if I have one, is that I agree with you, and Dator is a tool.