Much of this is likely true, but the career numbers are based on the assumption that he stays healthy and highly productive for a long time, and those things are not assured. A pace set early in a career often doesn't get sustained.
That's fair but probably overstated.
Keep in mind he averaged 300 yards passing last year and they gave him a better starting receiver at TE and the top WR in this class.
He could hit that passing yardage total in very few seasons by simply maintain last year's pace in a league that passes more as time goes by.
It'd shock no one if he averaged 325 yards per game next year.
Wins is always more iffy but we are taking an average of his 4 seasons here and with the talent in hand being at least as good as those other teams.
And a coaching staff that would rate at least a bit better by even Garrett's biggest fans.
QBs simply have long shelf lives generally. Most don't reach peak until about the age 30. That's 3 more full seasons for Dak to even get there.
Romo and Roger started out later in life.
Troy had back and concussion issues.
It doesn't mean Dak will be the best ever Dallas QB but he will likely be the owner of most Dallas QB records.
And that is the guy people are crying about paying.