Because the judge in question obviously wanted to create some law, and this case gave him the opportunity to do so.
The same thing happened in Roe v. Wade. Justice Brennan was ready to legalize abortion, so he arranged to have a bogus case brought before the Supreme Court. Then he primed that idiot Blackmun, whose name was put on the case as presiding justice, telling him what line to take. All that stuff about privacy being in the penumbra of the constitution.