Because Blough is worse than Goff. I guess we all forgot 2019 when Blough had Marvin Jones and Kenny Golladay and was still worse than Goff. I trust Campbell on the dynamics of the locker room. If Campbell thinks benching Goff in favor of an inferior QB will spark the team, than do it.
They were at their own 38. That's 62 yards, plus the drop back plus the depth in the end zone. You're looking at over 70 yards in the air. I don't know what kind of arm Blough has, but I doubt it's 70+ yards.
The Lions have 14 pass attempts and 30 run attempts and most of the pass attempts have been screens at the line of scrimmage. He took one shot down the field and seemed to grab his back afterwards.