That's crazy, must be a specific field? The overwhelming majority of college degrees don't require Windows.

You can nowadays do fine with macOS or Linux in most college degrees I've seen, since nowadays there are decent open source alternatives for the most prolific software that's on the level of popularity that it will be used in teaching.

However by default almost every college curriculum I've seen (unless it's in CS or IT combined field like bioinformatics) is still taught Windows-first, be it sociology, biochemistry or economics. In many you also have strong presence of MS Office suite, which is probably the first software that any university will buy license packs for for their students.