Would you say that most visitors to the beach "can swim" adequately? Do you think that if they got caught in a strong current that they wouldn't panic?
You may find Sosua boring but many (tens of) thousands visit every year. You may be a strong enough, experienced and powerful enough swimmer who knows the water there and to not panic but can you say the same for the people just visiting there?
How many or better asked what percentage of Dominicans are confident and trained swimmers? What about the percentage of them that are scared of the water or are not competent swimmers?
My answer to all of this is no, most people are not trained or competent swimmers. Many just want to stand in the waves and cool off. Most, even trained and experienced swimmers panic when caught by surprise in a strong current and many die. Many of the Dominicans I've come to know don't swim well and are fearful including my better half, and she spends a lot of time in the pool, too.
No doubt that as a windsurfer you don't find Cabarete too windy LOL but for the rest of us, anywhere that has to erect plexiglass barriers to protect customers from the wind and blowing sand has a wind issue. At least that's my supported opinion. Enjoy the breeze, Bear