I feel like we don't give tools like Microsoft Excel, Game Maker, Photoshop, or the web enough credit for the ability they empower users of computers. Without any formal training or education, they're able to use computers to their ends.
Give Excel to an uncontacted tribe and see how well they go with it.
That we assume reading, numeracy and fine motor skills which until 5 centuries ago were the preserve of less than 1% of the population in the West are not part of formal education or training should tell you all you need to know about how much cultural knowledge we assume people need to have in their daily life to function at the level of a 10 year old.
That 4 years to learn to read is considered normal but reading a 100 page manual is considered unreasonable shows us how much popular culture is lagging behind our tools. Given how technocentric our culture is, this is a situation as ridiculous as Mongols complaining that they need to learn to ride horses.