structurally damage a glider during a winch launch from overspeeding.
Providing the correct weak is used, that is not possible. Old myths
die hard though.
Why, then, is the winch launch maximum speed not Vne?

If I understand it correctly, flying at maximum winch speed or below
ensures that you won't lose your wings even if you use a wrong weak
link or no weak link at all.

Bartek