Sure, but why can't I replace the battery in my phone easily? Why does the computer that controls my fridge cost as much as a new fridge to replace (if you can

Sure, but why can't I replace the battery in my phone easily? Why does the computer that controls my fridge cost as much as a new fridge to replace (if you can even get one)? Why is a cheap printer about the same price as the cartridges? Our throwaway, built-in-obsolescence approach to product development is definitely a problem, but I think it's pretty obvious that the causes reach far beyond the use of resource-intensive UI frameworks.