There is no such thing as "universally a positive" unless you assume one. Not just in the sense of "there is no one true universal moral value function", but in the sense that "universal moral value function" is essentially gibberish -- as is "bad from a universal perspective". Humanity being wiped out would not be bad from a universal perspective because nothing is bad from a universal perspective. When we talk about good and bad we always implicitly couch that in "from a(/one or more) human perspective(s), ...".