Is that really a good analogy? Do you really feel that sitting in your car on a freeway is so radically different (and liberating) than sitting in a subway car?
If you're so certain that public transportation means giving something up, what is it that you're losing?
No analogy is perfect but, yes, that analogy is good enough.
If every car trip really did mean sitting in a traffic for an hour, then I would love public transport more. Thankfully, that's not the case.
My wife and I take taxis a lot and, even in uber-dense HK, we rarely get stuck in traffic. When we do, it's usually just at a handful of choke points, like entrances to cross-harbor tunnels, and the traffic gets moving again once one is in the tunnel.
As to what one gives up by not owning a car, living in densely populated areas, and using public transport, I would refer you to an earlier reply: http://news.ycombinator.com/item?id=3974910
Basically, living close together and without a car means that the pain-in-the-neck factor of practically everything is increased. Everything becomes at best just a teensy bit more of a hassle and needs to be scheduled more carefully. Convenience and the ability to be spontaneous become more of a luxury.
If you're so certain that public transportation means giving something up, what is it that you're losing?