Elephants without tusks are more likely to survive and reproduce, so while this is a "better" survival trait as part of an evolutionary process, it's not an active response. It's just a mutation that has a better chance to survive.

Like that click-baity headline from the Telegraph, it has a better chance to get clicks phrasing it that way, instead of "Elephats without tusks are more likely to survive violent poachers", imho.