I'm surprised there is even any discussion. We had them on the sailboat, used them automatically, and we sure got them on the 25. Hanging on in rough seas is fine, but we even used them for being at anchor when some jerk comes through or theres a good swell. Judy had a handhold installed for the port seat, on the bulkhead. That also works great.
You can't have too many handholds on a boat (especially one going 20 knts.) I want one on the front of the cabin so I can hold on going from the side to the bow, when we're at anchor.
Boris