"Robert Moore"
As can be seen, Vb, the speed for the maximum gust has nothing to do with
Va.
How does one find Vb for most of the GA fleet?.....simple...just look
for the top of the green arc on the airspeed indicator.
By flying at Va during turbulence, one is flying un-necessarily close to
stall and a possible upset.

At Va, it would take a full, instaneous deflection of the controls to stall
the aircraft. How is that un-necessarily close to stall?

The aircraft can be loaded to a much higher value with the controls than
by a 50 fps gust.

Whicih is why it is recommended to fly at Va in turbulent conditions. That
is, 1) because a full deflection of the controls, presumably commanded to
recover from a turbulence induced upset, will result in a stall instead of a
breakup, and 2) incidently because it is conservatively lower than Vb and
therefore well within any expected maximum gust.

I sense this is going to be a long one...