Printers and scanners aren't complicated, it's just that we don't really need to use them much anymore... until we have to. 99 times out of a hundred I don't need to scan because I can just take a picture on my phone of any hard copy document. I don't need to print because people are happy to receive an electronic document by email.
If I never had to drive again, I'm pretty sure I'd forget how to operate a car after a few years. If I'd never operated a washing machine in my life, I'm pretty sure I'd struggle to put on that first wash. Every time we have a power cut, and my oven refuses to work, because the clock is not set, I just push buttons randomly until it works. Instructions for resetting the clock are just not worth remembering, as it only happens once a year or so.
There's nothing complicated about these devices. I used to bootleg VHS tapes by hooking up two player/recorders. That's a skill that's completely useless now. These devices are just becoming obsolete, so we don't bother learning how to use them. I'm pretty sure I'd be unable to start and drive a Model T Ford, and I don't see any shame in that.