I don't know, Peter. Just about everyone on the first page of the leaderboard is bombing the ball 300+ yards this week. Cameron Champ, at the top as I write this, just played the front nine in 28. 8 under. He hit wedges or less into every par 4, and maybe even one of the par 5s (179 yards), which he eagled. His tee shots are averaging 326 today so far.
Luke Donald, btw, hit a number of drives in his first round over 300 yards, and averaged 295. While not long by tour standards, that means he hits short irons or even wedges into almost all par 4s on the course.
It's also worth noting that in the 2017 U.S. Open, Erin Hills played to over 7800 yards twice. Yet fighting for the win, tied for 1st with 8 holes to go, was shortish-hitting Bryan Harman, who finished T2.