No the ruling DOESN'T say that.
Other rulings say we don't have to believe in gender but there's still issues over harassment.
This is where pronouns become sticky. If we exercise freedom not to believe where does that meet with harassment?
Personally I don't think using correct sex pronouns is harassment if you otherwise treat someone with respect and without discrimination and don't single them out for special treatment (and this is lawfully where things probably sit)
But others will argue the case and I think this is one of the next areas that will ultimately end up tested in court.