Ya I once went to get my iPhone screen replaced, the technician wanted me to turn off my passcode just to diagnose the problem. I of course said I am not doing

Ya I once went to get my iPhone screen replaced, the technician wanted me to turn off my passcode just to diagnose the problem. I of course said I am not doing that. Instead I backed up my iPhone and reset it. This is ridiculous how can they even dare to ask people to turn off passcode and hand over their phones with so much personal information. This was not even an apple Genius Bar. This was an Apple premium reseller. I am sure many non tech savvy people just handover their iPhones this way.