I don't think calling it a joke is correct. It correctly self-describes as satire, which is quite different. Both use humor but one is not meant seriously whereas the other has a serious critique behind it.
A good satire should have a serious point it dismisses as part of the joke. For example Swift's "A Modest Proposal" is famous for its recommendation that Ireland's problems will be solved if the Irish eat their children, but it explicitly dismisses the possibility of taxing "absentee landowners" and other wealthy people and that is what Swift thinks you should actually do.
The closest ZeroVer comes is to quote Tom Preston-Werner, "If your software is being used in production, it should probably already be 1.0.0." which is something, but could perhaps be dismissed more thoroughly as undesirable or mistaken in this document.
