Obviously I am writing slower than I think. My point is only that on long trips like crossing the Atlantic Ocean, one need (or at least I need) to bring along food, water, diesel, spareparts, tools etc. If the boat is lightweighted, the freeboard will diminish and the wet area will become larger when the payload is big enough. This is by the way the reason why fishing ships seldom have any accidents towards the fishing place, but more often on the way home, because of to much payload.
A heavier boat can carry more weight without changing its stability.
I do not mean that a heavier boat is advantageous in any circumstance.
Use your head, ram the wall till it falls.