Why the Port Authority didn't extend PATH out to Newark Airport before is puzzling

So NOW the Port Authority, flush with a $27.6 billion plan, is planning to extend the PATH line out to Newark Liberty Aeropuerto. First off this is FANTASTIC. Johnny is gonna go do a happy dance for a second, he'll be right back.....

...OK, Johnny has made his last damned airport run once this is built!! Walk with people or drive them with their suitcases, should they need, to an existing PATH station near his house instead of driving out to Newark? Yes please! Moar of that!! You can read the AP article via NJ.com and see if this idea isn't a good one whose time was 10 years ago.