There is truth in your statement but allowing a bigger following distance allows easier braking.

I always find it hard in these big urban areas to take all the people diving into my following distance but I don't wish to tailgate and risk rear ending someone.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.