Robo-Train

Is there any reason not to computerize the L train? Why of course there is!:

Protesting a move to replace subway operators with computers, Public Advocate Betsy Gotbaum charged the high-tech trains put “riders at risk.”

“Good morning. Save the L train,” she said as commuters hurried through the Bedford Ave. stop in Williamsburg. “How is the train going to know when there is a worker in the tunnel?” Gotbaum said.

Does the Public Advocate actually do anything beyond just being a pain in the ass? Just asking.