1) Not made to be repaired. 2) Not made to last 3) Repair manuals are not easily and widely available 4) Manufacturer have monopoly on replacement parts making them extremely expensive.
I would instead create tax incentives which encourage manufacturers to make repairable and durable items, and pass laws which makes it easier for the competition to make compatible replacement parts so they are cheaper.
How many products don't we have where one stupid little plastic thing breaks and it becomes useless. Getting the part is difficult, expensive or hard to install.