Assuming your comment is only about proprietary cables that have usb a/c on the charger side, I tend to agree. Sometimes the device's form factor or function simply cannot accommodate usb-c without trade-offs.

I did lose my shaver's cable whilst travelling once, so I had to go to the barber to look presentable before a meeting. Not a big deal, but it goes to show that it happens. Had it been USB of any description, I could have bought one anywhere.

But then again I could have just as easily lost/broken the device itself and be in the same situation, so shrugs.