None, but the fact remains that lower volume is better for the ears, so prompting the user to lower it is a good thing.
Keep in mind that the vast majority of people use cheap headphones / earbuds that only sounds "good" at higher volumes. If you're walking around in a city with a pair of apples bundled earbuds and you try to actually hear the music, the volume has to be high.
For someone like yourself with a better insight into this, it's an unnecessary and annoying function, and that's why you can turn it off. That doesn't change the value of the function for all other users though.
None, but the fact remains that lower volume is better for the ears, so prompting the user to lower it is a good thing.
Keep in mind that the vast majority of people use cheap headphones / earbuds that only sounds "good" at higher volumes. If you're walking around in a city with a pair of apples bundled earbuds and you try to actually hear the music, the volume has to be high.
For someone like yourself with a better insight into this, it's an unnecessary and annoying function, and that's why you can turn it off. That doesn't change the value of the function for all other users though.