More of his footballs being thrown are being caught. Thus, a higher completion percentage.
I jest…but in all seriousness, does it matter? take a look at anyone currently over 70%
Buffalo
Baltimore
San Fran
Miami
LA
Dallas
Arizona
The bolded teams aren’t exactly considered high octane offenses, but they complete a lot of passes.
At the same time, the other 5 are the highest scoring offenses in the NFL.
It’s a nice statistic, and I do believe it speaks a bit to all the items you referenced (specifically efficiency) but at the end of the day, you have to score points. No Ravens (12th) or Cardinals (18th) fans are content because they’re in the upper tier of completion %.
If this number drops to 60%, I’m not sure it’ll bug me that much. Picture KC: they’re the 20th ranked completion % but have the 9th highest scoring offense.
It’s all relative.