There are astute observations! SCTLD only seems to attack a few corals in Bonaire, about 9 of the 20 that it attacks throughout the Caribbean, STINAPA says:
In Bonaire, it has been found on 9 coral species, the most common being: Flower coral (Eusmilia fastigiata), Grooved Brain Coral (Diplorialabyrinthiformis), Great Star Coral (Montastrea cavernosa) Knobby Brain Coral (Pseudodiploria clivosa), Boulder Brain Coral (Colpophylia natans), and Maze Coral (Meandrina meandrites).
Bonaire has a lot of different stony coral species;, many more than those 9; I estimate at least 30 are fairly abundant. Most of what we see -- except for the brain corals -- are not on that list of nine.
One should also note that we are entering peak bleaching season right now -- Mid-Aug to late Sept --so there is a lot of
bleaching going on that might look like SCTLD but it is not...it is just the zoozanthelle (colored algae) leaving the coral tissues...the coral is not dead.