Why do we have a fire alarm but no fire department?

I don't really miss the fire department although it would still be cool to have one. I think the sims in the Sims 4 are a lot better at dealing with fires themselves than they were in the previous games. I've had sims autonomously run up and extinguish fires in the Sims 4 which is something I don't recall happening in the previous sims games. I might just be having a bad memory though.