No that's what the summary tries to imply what the research says, count on research from LA being negative towards public transport.
Actually, I read both articles and the summary, and it doesn't seem to be what they are trying to imply at all.
But I agree with the GP that you get more control over people's ability to move around, if you limit them to bicycles or public transportation; for example, the BART stations that have been shut down to try and prevent protests against them shutting of cellular service in order to prevent previous protests, the ability to take busses and trains out of service to limit the ability of people without cars to move around and so on. They also tended to shutdown BART stations near the Occupy movement when it was still going on to any extent. Handy if you are trying to stop a zombie outbreak as well, I guess.
With the exception of short hall train corridors (because BART and CalTrain can't agree to share), and of course the Facebook/Google/Apple/Genentech/etc. busses run by those and similar private companies, public transit is pretty crappy in the SF Bay Area. The incessant BART strikes also tend to discourage use of public transit as well, but that's more about the unions blackmailing the politicians by pissing off voters than it is about controlling peoples movements.