That's something I can't understand. I understand they want a rigidity in the controller, is something that is used, pressed, throw away to a wall, falls on the floor, so I understand the plastic clips but still, Look at a Fluke, any Fluke:

A plastic case, with a ridge on the outside of one of the covers that slots on the other cover with screws.
No plastic clips, and it's a robust, no flex equipment that can be badly threaten without any sign of breakage. How hard is for Google to develop the controller in the same way? Same robustest to handling but at the same time easy to disassembly in case of needing a fixing.
In the current place, is one more thing that will die, when the battery dies, when the contacts wear out, and it's throw into a landfill, since by trying to open it will damage it for sure, and be throw in the landfill anyway.