I have detailed technical knowledge. However my time is not worth fixing every small gadget that breaks. If I break a blender, its simply not worth me sourcing parts, waiting, and then spending an hour repairing it.
This.
Decades ago, I worked for a large automotive parts supplier. A colleague wanted to get the bearings replaced in his alternator, so he strolled over to the alternator factory, where a friend of his worked and asked the friend to press in new bearings. When he picked up his "repaired" alternator, the casing had changed to that of a brand new model!
Then there is the time factor. A few months ago, when the alternator on my daughter's classic car failed, I just ordered a complete new unit. I could have ordered a diode pack, but I needed to get the car back on the road and I did not want to swap out the diode pack only to have to wait another week for another part if the diode pack was not the problem. I also did not want to take the alternator in and out more than necessary, because swapping it out is hard on my back. Not many years ago, I could have driven 10 miles up the road, bought a new diode pack and swapped it out, then replaced the alternator if the diode pack was not the problem, but now I have to rely on having parts shipped.