It is a complete mess in general. Couldn't Apple just start an MFI program for USB-C to USB-C cables, as well as adapters, to solve this?
Of course - plus, not
all USB-C stuff is rubbish or nonstandard. Stick to reputable brands and at least it won't fry your device, and if you're stuck for a charging cable, a trickle charge from a bog standard USB-C cable is better than nothing.
I
hate USB-C as an alternative to a sensible selection of dedicated ports
on a desktop or laptop... but that's all kinda water under the bridge now, and it's probably time to stop worrying and learn to love USB-C [grinds teeth].
However, for phones, tablets etc. where you need a single does-it-all port, you have to ask what is the alternative? MicroUSB? The extra-wide USB3 version of MicroUSB? They're just as much a lottery when it comes to fast charging, and can't support USB4 or higher-res displays. Lightning is great at what it does, but it's completely proprietary and you'd need a "Lightning 2" to support USB3/4/Thunderbolt/4k-5k displays which are now becoming relevant to the iPad and top-end iPhones. USB-C has it's flaws but - at least on mobile - it's better than the alternatives.
Currently, I'm still dependent on a USB A hub for desktop peripherals, and have accumulated a handful of USB-A-to-Lightning leads to charge Apple peripherals and iDevices - but going forward, if I'm going to have to migrate to a USB-C world (and I'm faced with a Mac Studio with half-a-dozen USB-C ports) I don't want to start buying USB-C-to-Lightning cables when some iPads are already USB-C (with some iPhones soon to follow).