Because that's what comes on computers, and that's what the software they need runs on. The obvious reasons. If you want to fix that, work in antitrust, work on

Because that's what comes on computers, and that's what the software they need runs on. The obvious reasons. If you want to fix that, work in antitrust, work on getting at least governments and public schools to choose FOSS solutions, work on improving FOSS solutions, work on Debian installers...