🤔 I would say the technicians who repair things (phones, washing machines, computers) and car mechanics.

Here in South America, you cannot take your car to any mechanic. You end up with more breakdowns than you had when entering the workshop.

And the same goes for electronic artifacts.

If you are not a trusted or recommended technician by someone known, it is better not to go. Because you will surely end with more breakdowns or other damaged pieces that "require change."