Think about what you are saying!! I haven't needed to transfer data from Phone via cable since I needed to sync music library in iTunes!! I have maybe 15 MagSafe power adapters, Belkin had a $10 sale a couple years ago and I bought 10 at that time!! They are everywhere!!!!!!!! As for a CarPlay, you can just permanently leave any cable - lightning, USB-C, micro-USB in the car and modern cars are going wireless CarPlay anyway. And it's bad to continually charge your phone all day in the car. Leave your house in the morning at 95% charge? Immediately plug in to use CarPlay? Bad for phone's battery. So, I humbly ask, when do you need a USB-C ever?USB-C matters because every other phone uses it. So many households will have different products types, not just Apple. Many businesses in the same situation. Many cars here now have USB-C ports. There’s still far more USB-C phones being sold than iPhones. So it’s more of a convenience piece to have USB-C / one type of connection. You might have MagSafe everywhere, but it’s not for everyone at all times. Sometimes you need / want a fast charging solution or need to transfer data via cable.
* The car's USB-C port? Good...lightning on one end, USB-C on the other.