It denotes a difference between the physical and the cultural.
Each post from the OP complaining about her suggests more that she's missing a difference related to hearing.
'It's an open plan office and if you are within listening distance you can naturally hear ppls conversations. Theres no need to turn your head to listen.'
Not always, you don't. And yes, for some people, there is a need.
Phoning another team when there's all this background noise around, workplace phones can be absolutely rubbish and the other teams might have even more noise, music, speak very quickly, quietly or with a strong accent - or worst of all, insist upon having their phones on sodding handsfree - can be impossible.
I've got people at work who I can understand clearly, they don't make a thing about me looking away to concentrate on what they are saying, don't insist upon eye contact at the expense of lipreading, don't whisper or try to keep their faces as impassive and unmoving as possible (by the way, Botox and fillers are absolute bastards for anybody in that sense). That doesn't mean I'll be able to hear or understand everybody on the planet.