I went to school in germany, we had a generic computer class for a semester, where we started with basic controls left, right mouse click, middle click to close apps, tripple click to select a row of text, f2 for rename, f10 create new folder, deleting files, installing and uninstalling software etc.

And even here Linux diverges. Middle click pastes your clipboard and only rarely do apps like pdf viewers support tripple clicking.

Later we learned photoshop, word, excel, powerpoint, internet explorer and how to use the powerful features in google search, like quotes, +, -, site: etc. And I must say, it proved to be extrenely useful. I constantly see people around me struggle with those tasks and I’m thankful for my school teaching me.

I moved all my PCs to Linux ~5 years after graduating and it sure was a long grindy struggle of frustration and accepting bad compromises. I tried using gimp for university assignments and it was a huge PITA. Touched a mac for a week and it was equally full of friction to learn and work with.

What I want to say is - I’m sure the re-learning is a similar struggle in either direction. So if you want to prepare students for the real life, it makes sense to learn the software they will most likely encounter in their real worklife. I’m sure most polish design companies use photoshop and illustrator on windows or mac systems instead of gimp and those school students will have a harder time getting into it.