They happily (most of the time) follow you into whatever God-forsaken, radioactive beast infested building you happen to waltz into and help you fight said beasts and maybe even pick a lock on a door or crack the code to a terminal that you will then go in and reap all the benefits from. Why settle for the bare minimum when it comes to your companions? They aren't simply wasteland labor, they're your FRIENDS.
A wonderful, and arguably central part of Fallout 4.