I always try to repair my electronics too. Sometimes enclosures are glued and designed not to be tinkered with. Other times things are much easier.

• I could extend the life of my washing machine that I couldn’t use anymore because two stupid click buttons didn’t work anymore. I soldered a couple of other buttons scraped from something old
• My TV didn’t work anymore. I opened the rear panel that revealed 2 boards, one for power supply and the other a logic board. i understood that in was the power supply board not working. Ordered one for 30 €and replaced it. A new TV would have been at least 300 €

But it is not something that people learn. I learned to repair my bike tube from my father. There are a lot of bike co-ops around. For electronics everything is much newer