TV is quite unique because they’re cheap so you watch ads and they watch you and sell your data. You don’t repair them not because you can’t but because it’s cheaper to buy a new one because with TV you are the product.
With all the rest you absolutely can repair it, it’s just way harder because the technology is more complicated, smaller, integrated better. I repaired my washing machine myself 5 years ago with no prior knowledge buying a spare part on aliexpress, and it was Samsung, notorious for subpar repairability. On the other hand, I failed to repair my smartwatch even though I had spare parts, again was incredibly easy to find, but it’s was so complicated and small so without expensive equipment I couldn’t do it, but that’s absolutely not their fault.
Meanwhile, 50 or so years old TV my dad refused to throw out for nostalgic reasons had to be repaired every year like clockwork, it took him a full day, and by the end of it’s life spare vacuum tubes were more expensive than a new tv.
Anyway, planned obsolescence was always a thing, the legends are saying the first commercial lightbulb was sold with this concept in mind. But it’s not as ubiquitous as we fear it is