Those official attendance figures count tickets issued, not how many fans actually go through the turnstiles. (Teams refuse to release those counts to the public).
You can see massive amounts of empty seats in 4 or 5 NFL stadiums right now. Some cities have extremely loyal fan bases regardless of record (e.g. Green Bay, Pittsburgh), but you can see many seats going completely unsold in Levi's Stadium (49ers).
In fact, Pittsburgh was the reference standard that the 49ers (for one) used as a comparison in selling licenses for their building ("see how WELL those licenses are selling! Don't miss out!").
You can see massive amounts of empty seats in 4 or 5 NFL stadiums right now. Some cities have extremely loyal fan bases regardless of record (e.g. Green Bay, Pittsburgh), but you can see many seats going completely unsold in Levi's Stadium (49ers).
In fact, Pittsburgh was the reference standard that the 49ers (for one) used as a comparison in selling licenses for their building ("see how WELL those licenses are selling! Don't miss out!").