Will pacquiao"s legacy be destroyed?

if he doesnt agree to take random drug tests? i mean its not like giving blood. for a drug test its like less than an ounce of blood they take. thats not gonna affect you at all. and the other fighter has to do the same thing, so its not like one person has the advantage. pac has enough allegations about using performance enhancing drugs and this makes him look real shady. i mean what is he sacred of?