You may be correct. However, I have heard of some cases where there have been structural failures
resulting from excessive g-forces, but the glider has remained landable after that. Aerobatics books
also recommend to "pull as hard as necessary", but to keep an eye on your g-meter and ASI. High AoA
eats energy rather fast. Flutter from overspeeding will definately disintegrate your wing.
Excessive-g may not. The trick is to stay within the limits as long as possible. Therefore it's
necessary to know the limits and their use. In abovementioned Nimbus 4 incident it seems that pilot
exchausted g-limits before the Vne arrived. But no-one knows what really happened.

BTW, there is one energy-burning device on every glider that may save you the very necessary second
or two - the wheel. Lower it as soon as you feel the threat of overspeeding. You may lose the wheel
doors because of the speed and g-forces, but this is not nearly as catastrophical as losing wing
because of pulling the airbrakes at Vne and high-g.