They don't need to teach "windows" or "excel". Working with an "operating system" and a "spreadsheet" is the real value. One can quickly pick up any equivalent technogy as they need to. There's no good reason to stick to the company that happens to have a monopoly at the time. In fact, it's better for society that they don't.

As for photoshop or any media editing program, I've never learned that in school anyway. That was just not a thing in any school around where I grew up. Maybe I missed out, but I'd say that elementary and high school curriculums are already pretty busy to focus too much on that kind of work. IME teenagers usually get into that kind of software at their own time and interest. I was into video editing and 3d modeling, but that was never in the curriculum, nor would i advocate for it to be.

Companies use windows at work, because it was used in school. Rather than adapt employees to Linux, better pay for windows (many go for very old and dangerous versions to spare money, and that threaten economy, but it is cheaper).

If workers know Linux, companies would make them work on Linux, rather than pay windows and adapt workers to windows.

As long as Linux is more likely to prevent massive hacks of companies'datas, the gouvernment should push for Linux at school in order to push companies toward their own safety...

It's interesting to hear Photoshop and GIMP have diverged so much! I haven't used Photoshop in 20 years but when I initially made the switch it was pretty simple. I guess photo processing has changed a lot in that time, eh? 😅

No idea where are you from but in Poland there is no way someone teaches these programs at schools. We teach gimp on windows so no problem here.