Because stating that people are biased for beauty and youth and western, predominantly white media are biased for whiteness, is like saying that the sky is blue. It adds nothing and detracts from the story, which is more about the excessive drinking culture in youth, backpacking, thrill-seeking, Southeast Asia, and a host more closely related topics. Noticing that the faces on the BBC heading are pretty blonde girls and making an issue of it is anything but deep. It is the most superficial thing you could notice and comment on, bordering on creepy, because you reduce a story to “pretty blondes”. If and when you suspect that an important story is buried because its protagonists are not conventionally attractive or because of their race or gender identity, then do bring it up. Then you are helping elevate people whose stories perhaps should be told and heard more widely.