What he is trying to argue is the stats that say
Tomlin is subpar as a favorite. Idk what the current totals are, but for years Tomlins record as a double digit Favorite was somewhat beneath the league average... it was as a 7 and 3 point favorite too, but much closer to average... the league winning average as a double digit favorite usually is around .875
at one point probably five years back, his was at like .800.., that is significant, but not as significant as the haters think..
like if the Steelers were favored by double digits every game in a 17 game season, they would finish with one more loss than an average team...
this is likely due to his philosophy of keeping the game close..
Conversely, he is one of the greatest coaches as an underdog... because it works both ways...