> Roads may have problems but the alternative you're proposing is far worse.
Sorry, but "far worse" is simply excessive.
Living in a large European city, namely Paris, and having experienced both car and mass transit, I prefer the second option a lot, to the point I sold my car without replacement about 6 years ago after 2 years of barely using it.
There is of course the ecological aspects, but even in terms of quality of life, I much prefer public transports: it's cheaper, it's less stressful, it's more predictable and I'm able to do other things like reading while transiting.
By comparison, in this context (dense urban area), cars, with their needs (maintenance, parking, etc) are actually more constrain than freedom.
And that's not like I'm a unique case, most of my colleagues either use public transports or (e)bikes, car users are a minority (~20%).
In Paris, there is even a large proportion of the population who didn't even have a driving license at all.
Doesn't it means that mass transit is the perfect solution? no. But in dense urban area, it's probably the best compromise.