To the tree haters, I think the tree adds to the complexity of the hole off the tee. Sure there are lots of things to think about off this tee, especially for the bogey golfers, and the tree adds one more, but why is that bad? For the flatbelly's off the tips it is probably irrelevant, but if it gets in their mind just a bit and encourages a shot down the left side to a less favourable angle, that's good.
The architect gave you a very wide fairway to hit to. How easy do you want the tee shot to be. For the bogey golfer it provides a direction sign away from the more penal water (and might even knock down a few wayward shots headed for the water).
And, besides it was there before the golf course was.
The pond is I'd guess man-made or at least enlarged. But it is the lowest point and no doubt captures a lot of run-off down the very steep slope to its right. And, if fairway width is provided, as it is, what's wrong with penal hazards to one side? Especially on the side of the preferred line. The bunkers are all hard packed sand so long shot recoveries from them are not so difficult.