No, they could drop the main entirely and sail at much lower angles of
heel -if that would be fast -but it wouldn't be... If they are offshore
racers they have 3 or 4 reefs and a trysail too.

Some of the boats in the photo have more reef in than the others. I don't know
of any race boats that have 4 sets of reefs and nobody's going to drop the main
and put up a storm trysail in 30kts. Plus your also forgetting that different
boats are sailed differently. For example anybody that races a J30 in a one
design fleet NEVER reefs the main no matter what's going on.
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