RTFM is an answer that can be given to many people when they ask you questions about their devices. But then reading information and acting on it is a skill not all humans have. As an IT engineer, I voluntarily assist numerous computer users, but often have to point out to them that the very information they needed to solve the problem was on their screen all the time.
Another meaning of the word manual is found in the manual transmission of ICE cars. Given the facts, we can see how electric vehicles are never fitted with manual gearboxes, and since the EV transition is well underway, it is doubtful whether my grandson will even know what a manual transmission even was. He's still a baby now, but the tech disruptions are going exponentially faster...