It's so funny that you think either of those numbers is from the qb and the qb alone.
Passing stats are based heavily on scheme. Tyrod played in 2 fewer games than Fitz and attempted 182 fewer passes than Fitz.
Fitz: 562 Att, 3905 Yards, 31 TDs, 15 INTs
Taylor: 380 Att, 3035 Yards, 20 TDs, 6 INTs
If you scale Tyrod up to Fitz's attempts (unreasonable) his stats are 4488 yards, 29.5 TDs, 9 INTs
If you scale Fitz down to Tyrod's attempts his stats are 2640 Yards, 21 TDs, 10 INTs
All in all your base of criticism for people who appreciated what our QB did and call Fitz a backup is simplified to the point that it makes no sense. There are many many factors involved in both TDs and Wins besides the QB himself. But hey, let's consider the QB in a vacuum. Makes sense.