Why? You can convert energy to cost and back - its all the same energy source for EVs vs public transit. Ultimately cost is what matters anyways.
Who cares if the energy requirement of public transit vs an EV has a huge delta (spoiler: there isn't a huge delta in terms of energy per passenger mile). They are both super low and efficient.
To you, now. But the biggest problem of humankind right now is energy. Consequences of our use of energy are climate change and biodiversity loss. But even ignoring those consequences, we are going into a world where we will have dramatically less energy. Not in 100 years, in the next few decades. So you will live in that world.
Who cares if the energy requirement of public transit vs an EV has a huge delta (spoiler: there isn't a huge delta in terms of energy per passenger mile). They are both super low and efficient.