Teaching about version control would be preferable to a singular tool. Git wasn’t always the #1 tool nor will it be forever, & there are some great tools pushing against Git as we speak which will be great for all of us when something truly better usurps—like Subversion, the former king. Training on a singular tool is like learning Microsoft Word instead of document processing where the broader concepts are more valuable for your career as you understand not just how but why.

Personally I had a lot of fun giving darcs & Pijul fair shakes in 2023 to understand what makes the patch theory cool to work with. You could probably do a whole course on VCSs & their models since you are correct that they are rather integral to real world teams & projects.