another way of looking at it is, the system is designed with human needs of the customer in mind first, and the economic needs of shareholders are somewhere farther down the line
This cannot work since both double and tripple As has the same voltage, and thus does not have a difference in light output. What we'd instead be looking at here is the battery/ies being drained faster the fewer there are of them. But yeah having it work no matter the amount of batteries installed is a neat idea
Batteries wired in series increase the voltage provided. The example in the OP us just a battery whose LEDs run at anything from 1.5V to 6V and accepts both AA and AAA batteries. It's not a foil to planned obsolescence, it's just smart design. It could still be made with the same design, but purposely use LEDs that die sooner, in which case it's smart design and planned obsolescence.
I assume there are either voltage sensors to detect which batteries are installed in order to control the light intensity, or there are multiple individual LEDs attached to the individual batteries.
Solarpunk technology
Technology for a Solar-Punk future.
Airships and hydroponic farms...