Apple's charger unbundling was stupid.
They sold the iPhone with a USB-A charging brick for like 12 years. Then when the iPhone 11 came out in 2019, it came with a USB-C charging brick and a USB-C to Lightning cable, which would not work with any of the chargers they bundled for the past decade and some. And then, one year after changing the cable, they took away the USB-C charging brick.
"Just use the ones you already have" when you'd only have a wall charger that could take the cable that came in the box if you bought the iPhone 11 as well, or bought a separate charger.