I have never said in my piece that you should stop voicing concerns. What I am pointing out is that the debate on rail, from critics like you, have gone way beyond just the "critical thinking" that a project like this naturally creates. In many ways, the critical thinking has yielded to "set thinking" that this is right, and that is wrong...no matter what the circumstances are. 
And that type of critical thinking closes up the ability for anyone at this point, who stands back and looks at the project from another set of eyes, and has the ability to ask "well, what about the contracts, and the contractors bidding on this...why are they bidding so much higher than the initial estimates?". Is it because they are forced to adhere to the Federal Davis Bacon law, Title 29 CFR 5.5? Is it because they are padding the bids? While you may be critical of how the City is spending the tax dollars, is there any call by you or any of the critics for accountability at this level?