Beef fat is bad?
Lucky for us our ancestors managed to survive eating it. And pork and lamb fats too - and as for all those geese eaten at Christmas - and yet heart attacks were so rare at the same times as they were eating all that fat.
I'm afraid that there does seem to be a distinct lack of correlation in the results - avoiding fats doesn't seem to be producing an increase in cardio vascular fitness, in fact, just the reverse, so concerns about coconut oil would seem to be rather irrelevant.