At the moment there is no reason to play, it just isn't fun.
There are not enough reasons for civs to interact with other civs, this made it so player interaction between civs and other civs is minimum at best; instead, the main interaction is between cops and civs which is not overly enjoyable and gets old quickly,
Civs need something to do that doesn't involve shooting up some cops or robbing some stores to get some interaction, whether this be a civ vs civ gang area, civ run businesses, Governor and guards, assassination mission involving NPCs and police escorts (like Arma 2), random events or just a bounty system.
Passive activities like a go-kart track and jobs will help to overcome this lack of fun and enjoyable activities.
The way I see it is: if we remove cops and ems, what activities can the civs actually still do? Answer: Not a lot.