Paid to sleep, fly for fun
A regular Captain Ross.When my dad was first learning to fly in the AF, his primary instructor used to flash a high beam flashlight in his face randomly. It pissed him off, but there wasn’t much he could do about it. Thought the guy was just being s dick so he learned to ignore it. First time he flew through IMC at night with lightening flashes, they didn’t bother him at all and he realized what the instructor was doing.
In your case, I think though that your instructor doesn’t know he can turn them off.