I thought #10 at Merion only worked because they grew the grass 8-12 inches long to guard the corner of a 90 degree dogleg. My host, a strong player, aimed for the green both times and probably made 4-5. I aimed for the fairway both times, missed both times, and made a 4-5.
That's the thing about "weak" holes. It is what it is, it's got to be hard somewhere, and you just try to hit the right shot.