we are talking about a lightweight charging cable. you can carry more than one. boom, redundancy. being ideological about a cable connector is the nerdy equivalent of jony ive obsessing over macbook thinness.
The thing, it's not just about what cables you have at home, or even which ones you bring on a trip. It means if you go out on a trip with a small bag and a battery, you only ever really need one cable. It means you don't have to think about "which cables do I bring?", completely removing a question. That's really nice!
Forget that noise. Now its all one cable. Laptop, game console, phone, wireless headphones, reading device, even things like flashlights and lanterns. All one cable, can all work with the same extra battery packs and the same power cords.
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.