Why can’t he make music, read music history or biographies, or do other things?
Do all “software engineers” need to interface with a computer 7/24, Matrix style?
It's also fair game to critique these photos from an artistic perspective. Some are clearly intentionally staged and I argue that the messaging is a little clumsy. Sure, it's hard to avoid if you've filled your space with expensive design objects. Another comparison is cooking blogs where the photographers add visual clutter that looks good on instagram, but is impractical and unrelated to the food being cooked. The space itself is very nice, though you've got to be absolutely anal about keeping clutter down.
Putting them anywhere else in the house would either be more "showoff" or just less practical. It's true that I rarely ever pick them up but the few times I do I'm glad they're right next to my work desk.
(Though the fetishisation of this shelving seems weird. Maybe as I grew up in the UK, but I associate it with every single public and office building. Every library, every office, every school. It's not what I'd choose for home.)