Most phones now days have camera set up so your fingers dont obfuscate the camera lences or smudge them when you hold it on your hand. Same with the front camera. If it it would be on the bottom part the navigation buttons would go over it --> more smudge on thr lense.
With buttons there is the design principle that buttons should work always similarry. Flipping the phone would flip volume settings, buttons and any ports. (Its a minor thing, but i think everyone has somepoint in their life used a software where buttons chance places depending what you are doing and its annoying. This is basically hardware version of that).
No reason here is not really hard to circumvent or even a real problem, but in the end, so small percentage of people need that feature, so why spend time doing it. Especially when it indroduces one new thing that needs to be debugged.
It has little more nyance than that.
Most phones now days have camera set up so your fingers dont obfuscate the camera lences or smudge them when you hold it on your hand. Same with the front camera. If it it would be on the bottom part the navigation buttons would go over it --> more smudge on thr lense.
With buttons there is the design principle that buttons should work always similarry. Flipping the phone would flip volume settings, buttons and any ports. (Its a minor thing, but i think everyone has somepoint in their life used a software where buttons chance places depending what you are doing and its annoying. This is basically hardware version of that).
No reason here is not really hard to circumvent or even a real problem, but in the end, so small percentage of people need that feature, so why spend time doing it. Especially when it indroduces one new thing that needs to be debugged.