Have you never heard of adapters?
And, in the end, we a have to decide on one standard. There used to be tons of different cables, and that wasn’t exactly a better situation. Better to just bite the bullet and say this is the standard moving forward.
I’ll bet my left nut that you don’t have a male USB-A to female USB-C adapter that can support fast charging. So you’ll still end up ordering one from Amazon - a local store is unlikely to carry one.
USB-A to USB-C is the current standard. I am convinced they include a USB-C to USB-C cable because most people don’t have those chargers, so they’ll be more likely to order one with their phone.
USB-A doesn’t carry enough voltage to support USB-C fast charging rates. So even if you have an adapter (I have a few), you’re not getting the best performance from your devices.