Of course, it's helpful to have your keyboard farther away to minimize bending of the wrists.
Your keyboard isn't supposed to be far away though. Your ideal upper body posture is the same as when you're standing up as you're sitting down. If you feel most comfortable with your elbows elevated 45 degrees forward in front of you when you're on your feet, then I guess that's your ideal keyboarding posture.
That's a joke of course. Unless you have some unusual anatomical restrictions or mobility problems, your arms are down by your side. That means if you're sitting, your arms should be bent at an angle to allow you to keep your elbows in approximately the same position as when you're standing.
With good posture, you also don't need to have quite as extreme of an angle in your wrists to put your fingers straight on the keys. A lot of people sit in these great big chairs and put their elbows on the widely spaced armrests. That increases the angle that you either need to bend your wrists or contort your fingers to compensate.
Now, you're correct that moving your keyboard out farther may reduce stress on your wrists, but what you're doing is shifting the ergonomic stress to another part of your body. In exchange for your adjustment, you'll probably put more strain on your neck, shoulders, or your low back. If you have wonky wrists, it may not be a bad tradeoff, but it is indeed a tradeoff and not really a "better" technique.
