that depends very much on the lighting in which a picture of Apple Beige is taken, the colour space of the photograph, the colour temperature of the monitor, the display gamma…
https://www.pantone.com/color-finder/14-0105-TPG
But you're right -- with a color dropper, I'm getting all kinds of results, typically a darker ~999281.
My preferred color scheme most definitely doesn't look the same for me as for the designer with his color calibrated screen. But it's close enough that I wouldn't even consider comparing it.
That depends on what you want to do. If you want to represent Apple Beige _as it appears in a particular picture, on your display setup_, then no: if you want to do anything else using the Apple Beige colour, then yes. Saying "this object has the colour #123456" is not wrong, in that it's Not Even Wrong (https://rationalwiki.org/wiki/Not_even_wrong). It's like saying that my weight is "moves the scales needle by 35°".