Which 21 games of futility are you referring to PB? Starting with Denver last year? That seems like a stretch to me.
2015
Opp. - GB Pts. Yds.
CHI - 31 322
SEA - 27 361
KC - 38 448
SF - 17 362
STL - 24 322
SD - 27 370
DEN - 10 140
CAR - 29 402
DET - 16 372
MIN - 30 320
CHI - 13 365
DET - 27 313
DAL - 28 435
OAK - 30 293
ARI - 8 178
MIN - 13 350
Playoffs
WAS - 35 346
ARI - 20 386
2015 - 15th Scoring, 23rd Yards
2016
Opp. - GB Pts. Yds.
JAX - 27 294
MIN - 14 263
DET - 34 324
NYG - 23 406
DAL - 16 372
CHI - 26 406
ATL - 32 331
IND - 26 405
TEN - 25 402
WAS - 24 424
PHI - 27 387
HOU - 21 309
SEA - 38 330
CHI - 30 451
MIN - 38 348
2016 - 6th Scoring, 10th Yards
Granted, Rodgers had his career-worst stretch of games across these 2 years - (compared to the most prolific extended stretch in history), but I'm seeing 4 or 5 sporadic games of "offensive futility" - not 21. Also, "STILL" not having "learned lessons" from "offensive futility" would seem to imply repeated failure to finish games...
In the last 2 years, the Packers are:
- 16-1 when leading at Halftime (4th)
- 16-0 when leading going into the 4th Q (1st)
The Packers' identity is to get leads and finish games. Their (admittedly small sample) results, indicate they're among the best in the business at it. If you look at the full body of results over Rodgers' and/or McCarthy's careers (to enhance reliability/objectivity of sample size and avoid selection-set bias), that holds up in spades.
The offense has certainly contributed to a number of losses over the last couple years, but I'd say the extent has been borderline grossly exaggerated.