On an ad for shared housing, why don't people talk about who lives in the house?

Ok, maybe this is a rant, but I’m genuinely curious. And amazed. I’m looking at shared housing because I want to live with other people. The vast majority of Craigslist ads I’m looking at say NOTHING about the people who live there. It’s as if I’m just living in a room, and that’s all I’m interested in.

What I’m really looking for is ads that talk about the people who live in the house, the vibe of the house, what kind of roommate they’re looking for, etc. Why don’t people write those kinds of ads??