That was exactly my reaction. I think I said "What, a Speedmaster is qualified for space flight but can't survive a round of golf?" The point is that (and I didn't know this at the time, as I assume most people don't..) a golf swing generates over 100G of force. Plus the jarring effects of hitting the ground. The fact that it's a "dive watch" is irrelevant. You won't get any jarring movements or extreme g-forces diving. There's no need to consider buying a Sub - it's exactly the same.
But the fact of the matter is that Omega themselves were asked the question in the Omega Lifetime "The Golf Edition" magazine from a few years back. There's a whole feature dedicated to the forces of the golf swing and how the new (at the time) 8500 movement isn't affected by them. I've taken some pics of a few relevant passages. The third pic has a very important paragraph half way down...
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