I mean, they’re all installed on your Mac already

1. Profit.
2. They can stick more phones per pallet when shipping, meaning less containers, and more profit.
3. Do you really need a new charger and set of earphones every time you buy a phone? I’m still using the USB-C-to-lightning cable that came with my iPhone 11 Pro.
4. It does reduce e-waste to a degree.

The silver still looks best imho

Tim Cook had the opportunity to wear the greatest costume ever but he decided not to