Hey Gil,
On the one hand, you are absolutely right, but on the other, after spending a couple hundred hours and several thousand dollars, a fine finish is in order, plywood or otherwise... (but I certainly wouldn't go nuts perfecting finish over going sailing....!) Remember these are sleek racing machines, not for conducting guerilla warfare on defenseless trout...
And Andre, if you decide you are not happy with the finish, you can always cover it in stickers, NASCAR style...
Cheers,
Dan