The waterproof case for my 4k Action Camera doesn’t let me get at the ports and memory card (obviously) and there’s no screw thread in the camera to mount it without it. This meant I needed an accessory to do the job.
While you can now buy a RaspberryPi Zero or ZeroW with Header pins pre-soldered, there are still many boards available without them.
Those headerless boards need not gather dust, as you can quickly add headers to them. Even if your solder skills are a bad as mine.