The issue here is that garbage is an externality. If the device can be repaired it remains in service, otherwise it goes to a landfill to be replaced by another device that will itself also end up there.

Garbage is a problematic externality because if you try to charge true cost for it, people throw their garbage in the street or the ocean instead of paying. So we generally have subsidized trash pickup, and then "the market" literally overproduces garbage due to the subsidy.

One solution to that is to require the devices to pay the recycling cost up front, but everybody hates that because it makes the device more expensive, moreso than making it repairable would.

The other is to require it to be modular/repairable so that when one component fails or becomes obsolete it can be replaced or upgraded, which extends the life of the other components and reduces the total number of devices that have to be produced and ultimately end up in a landfill.

This may actually increase the original purchase price of the device by quite a bit, because the manufacturer will end up selling fewer units (that's the whole idea) but still have to recover the same fixed costs. But then the user doesn't have to replace their device as often, so the net cost should be slightly lower (the gain being the actual reduction in waste).