Light from the Sun comes at different angles depending on longitude of location. Closest to perpendicular around equator and steepest at the poles, One can see the average temperature of those places which is related of amount of sunlight absorbed which is related to the angle of light hitting the Earth. That is a nice example of light angle and absorption relation. That is only thing I'm saying, nothing about angle of leaf and seasons, I see that is a indoor tent. Nothing to do with what I am saying.
What I do not agree with is that the plant craves the light so it turns its leaves at angle from light, as You can now conclude, this angle is making less light hit the leaf, meaning it now receives less light. As You say - each strain grows differently and requires different conditions, so maybe this strain requires less light, that explanation would not contradict with laws of physics.
And You are right, lamp is not rotating, but leaves do move. You can find many examples that are not cannabis, how plant protect themselves from too much light in nature, by moving/folding its leaves.
And You again assume I am googling things and posting it here for some reason. Yes, I am new user, with only little involvement in this forum. Does say completely nothing about my knowledge or experience. But it tells a lot about Your attitude. I am not here to prove someone wrong, but to gain and rise our common knowledge about all these topics.