Yep. Sometimes its the only way you are going to move them. With a little planning you can adjust them when they are unloaded . ie stopped or whilst manouvering through a tack or gybe. If you sail by yourself then the old trick of flicking the boat
off the wind
with the helm
while the crew quickly adjusts as the boards unloaded wont help you.
If the cases are angled inwards at deck
level you can use a halyard
to hoist them. Good luck getting them down though.
Sadly all this brute force and ignorance is going to damage the surface finish
on the boards if there is any grit or growth present reducing their effectiveness.