For example, I learned some basic mathematics, physics, chemistry, biology, history, geography, etc in school. Until I got to university, what I learned wasn't enough to make me a mathematician, physicist, chemist etc. It did give me a baseline on which I could build and it gave me exposure. This exposure was forced on me, but what I did with it (a computer science degree and a programming career), was something that was left up to me to choose later.
I see computers/software the same way. Its common enough in day to day lives now that I think a baseline of computer literacy and some basic exposure should be required and afterwards the students can choose if they wish to explore more or not.
The exposure doesn't necessarily have to prep them for real work (I'm pretty sure dissecting a frog isn't going to prepare me for veterinary work...), just give them a taste of how things work.
Of course the question this leads to is "what is thr basic level of understanding that people should have in any given topic"?
That sounds hilariously naive. If we'd let people decide themselves what they want to learn the majority would still be in the sandbox making castles and playing with toys all day.