[O.B.Left]

No I don't think it can be any other way.

G@###it, I failed to ask the right question!

What about right wrist bend. That's what I was looking for: Does it increase when the elbow is straightened (for snap release)?

Bad mistake on my behalf. I'll edit my first post if I can.

No! Right Arm extension is independent of Right Hand Bend. In fact Homer called this golf's unique move; the extension of the right arm either passively (swinging) or actively (hitting) with the Right Hand held in its Impact Fix degree of Bend. A motion not typically found in other sports. Basically Homer wanted us to learn to extend our right arms while being able to maintain various amounts of right hand bend (given ball placement, Fix alignments).

The Swinger starting at Adjusted Address with a Flat Right/Bent Left set of hands
must establish his Impact Hands Alignment (Bent Right/Flat Left) dynamically, normally during Startup. The Hitter on the other hand, having started with Impact Hands from Fix , needs only to maintain that alignment. Any additional Right Hand bend will have an associated Arching motion to the Left Hand. This is unwanted Horizontal Left Wrist Motion (although a tad of Arch is often viewed as insurance against the dreaded bending left wrist. As a side note some of the arch you see at impact is really a product of grip type and shaft lean and not a true Horizontal left wrist motion).