Jon, there's no out of bounds on the 9th. If your point is that the bundai is left, that's of course very true, and it's one of the few places a lost ball is a real possibility, so it's certainly the place to avoid.
The other thing for me that's noteworthy is that it's the rare short par 4 that's just dead simple. A more actively designed course would likely have a hole that short be very tricky in some way. The (original) Eden has wonderful short 4s, but they're very tricky at the green certainly but also up to the green. Instead the 9th's green is as dead flat and simple as can be, which is actually quite unique. A green that large and flat (and a fairway that open) breaks all the 'rules' of what a short 4 should be.
All that means the golfer has a lot of pressure to score well at the hole, which happens much less frequently than it 'should.'