Though fixed many years ago, there may be a lack of trust due to previous ability for malware to take snap shots without turning on the camera LED.
https://www.theregister.com/2013/12/19/apple_isight_webcam_l...
https://www.theregister.com/2013/12/19/apple_isight_webcam_l...
Personally I wish all my devices had hardware toggles for camera and mic, both. Phone included, since it's only a "phone" a small fraction of the time these days, the rest of the time it's a small Web-stuff device.