It actually is.
What elite passer do you know that consistently throws less than 4000 yards a season?
I think more passing yards just doesn't equal a harder offense or harder team to face. You're asking us to grant you the premise that passing yards are an indication of elite status. But they aren't. Any halfway lively arm with enough passing plays or garbage time can post HUGE yards. The TD-to-INT ratio stat is the best indicator of quality.
We could easily, just by giving in to our worst, most cutesy pass-happy urges, turn our passing game into one that piles up more yards. But I fear it would only make us easier to beat. Like what's happened with the Seahawks.
Russell Wilson averaged in the low 3000's for his first three seasons. And Seattle was 11-5, 13-3, 12-4, making Super Bowls. Pretty great results, and that was before their division turned to trash when the 49ers tanked. They were very hard to beat. They were much more feared back then.
Then they flipped the switch and turned into a 4000+ yard passing offense, and they've taken a step back as a team that tops out at 10 wins and doesn't make Super Bowls.
Sure, they're harder to match up against in the passing game now. But it's come at the expense of clock management, physicality, and a defensive mindset.