You're out of touch. It might not be common for families, but it's very common for young adults to share an apartment. And you're trivializing what activists are trying to do when they talk about making sure people have a "living wage."
As an only slightly older adult, let me assure you that after years of petty arguments, no-fault evictions, playing Craigslist roulette for new roommates, sitting in massive group interviews to compete for a room, other people's animals ruining your shit, etc. ad nauseum, "a room in a shared apartment" will stop being an acceptable option. I never thought I would get there either. Just give it time.