there's a lot of relevant things i could get into on it. in short though, disposable items are cheaper and despite what a lot people think - most of us are broke.
after you adjust to dealing with disposable items a lot.. you kind of grow out of the feeling that every item is special and needs to be repaired to max extent and kept for as long as it can. It feels anthropomorphic / overly sentimental to do that. the moral argument gets the curtain pulled back and there's very little substantiating it. imo, at least. Curious if you can shed better light on your moral stance here tbh. im not die-hard on this subject and would happily update my views if convinced otherwise
I respect that you have a productive hobby interest in repairing items, and for the most part I share that. But I dont see anything wrong with throwing something away that could be salvageable. Once it stops working, it is just parts and material and I now become part of the demand for toasters. What's wrong with letting toaster specialists handle toaster demand? In the time it takes me to repair a toaster, the specialists can produce 100 of them. and thanks to people like me buying from them rather than doing it myself, they remain productive members of society and get to feed themselves. And I get a couple hours back to do something else to potentially improve society or my personal life.
All that said, I do think there is a lot more we can do with waste management to better deal with disposed parts and materials, though. A lot of how we handle disposed goods is definitely wrong. we mix materials with food waste and it makes everything gross and expensive to work with. food waste really should be a hard split from everything else but maybe one day