"pirated" yes but you can often source the install images direct from Microsoft and then use open source tools to crack the activation systems. Microsoft has kind of stopped policing piracy at the individual user level, you can even download Windows cracking tools off GitHub, a platform that Microsoft owns. As long as you're using their software it makes them happy. And LTSC is worth it to have a barebones no-bullshit Windows installation.

You act like we don't all already have pirated copies of windows. Might as well get security updates.