Okay, now I get what you’re saying and you’re absolutely correct. But from the perspective of the photographer, it doesn’t really matter. The motif you’re aiming for is fixed. What you then influence is distance and lens and lens I can directly read from my camera. If I shoot with a wide angle, I have to get closer to get the motif that I want, if I zoom in, I need to step back. So, yes, technically distance is what matters but the distance correlates with the lens I’m using. That’s why tips like “shoot portraits with 85 mm to get the most natural look” still make sense although you’re right
Okay, now I get what you’re saying and you’re absolutely correct. But from the perspective of the photographer, it doesn’t really matter. The motif you’re aiming for is fixed. What you then influence is distance and lens and lens I can directly read from my camera. If I shoot with a wide angle, I have to get closer to get the motif that I want, if I zoom in, I need to step back. So, yes, technically distance is what matters but the distance correlates with the lens I’m using. That’s why tips like “shoot portraits with 85 mm to get the most natural look” still make sense although you’re right
You can also just crop the picture instead of getting closer. Especially with modern cameras with a zillion megapixels this is a viable option.