Because Creationism focuses on before the Fall - that supposedly was when Adam and Eve hand-fed dinosaurs, and that is when they were naked. If they say that dinosaurs started eating meat after the Fall, and that is when Adam and Eve got clothes, it is inconsistent with their beliefs to mix the two periods up.
'Cause, ya know, if actual accuracy is too much to ask for, the least they owe us is internal consistency.
'Cause, ya know, if actual accuracy is too much to ask for, the least they owe us is internal consistency.