I think you have cause and effect the wrong way around.
These changes in design are intended to appeal to our magpie brain of wanting the latest, shiniest, things.
You have to understand the vanity of consumers. If every new product looked the same then a lot of people wouldn’t both buying the latest gizmo because there’s no magpie appeal. So when the market stagnates, you need to redesign the product to convince consumers to throw away a perfectly good, working device.
And it usually works as a sales strategy too.
So designers then get told thy has to come up with something that looks newer and more futuristic than the current designs. Regardless of how much those designers might love or hate those current designs.
They come up with this shit not to justify their jobs but because they’re hired exactly to come up with this shit.