Along with those nearly 5000 yards passing, to go with those 29 TDs(all of which you readily dismiss), he led a top 5 NFL offense(both passing and total offense). What more evidence do you need?
I don't dismiss 29 TDs, that's a nice season but w/ 16 INTs and leading a team to 9-7 that take s a little lusyer of 29 TDs. The O may have been 5th in pass yds but was 9th in pts scored.
If he doesn't have the huge offensive #s(which he never has) he needs great pts scored and team #s. 9-7 in a mediocre division, 9th in pts scored isn't cutting it w/ his individual #s.