Because hotness is a vapid, ill-considered cheat so you don't have to discuss, think about, or take a position regarding the quality of anything. "You know what's hot? Twilight!" "Okay, but...is it good?" "Not the point! Not the point! Read these 1000 words on why it's hot!"Hottest Baby? Is hottest baby thirsty? I've got just the thing.
Consider the Rolling Stone ["hot"] list. Barack Obama is hot; so is Leighton Meester from Gossip Girl. The sport of winching is hot; so is genuinely brilliant musician Bon Iver.
The closest I can come to explaining what "hot" is supposed to mean in this context is something like: "Things you have already heard of, or things that everyone else has heard of except for you, and if anyone finds out you haven't heard of them, they'll make fun of you, so listen carefully."...
If you wander through the recent news listings looking for the word "Hottest," you will see exactly what I mean. As of this writing, the results include Lonely Planet's possible endangering of the Bay Of Fires by naming it the "Hottest Travel Destination" of the year; a discussion of the continuing hotness of the Wii; and plenty of coverage of the aforementioned Suri Cruise being named the Forbes "Hottest Tot."
That's right: Hottest Baby.
I think Holmes should simmer down. There's a benefit to labeling things hot. It tells you to move on to something else, something newer and hipper or -- if you hate hipness even more than hotness -- to whatever it is you actually like as a matter of personal taste -- if you still have any. If you don't. Get some. It's hot.