you could also work from a car if someone else is driving it like a taxi, but imagine the price difference to travel such a long distance every day over rail versus metro + rail.
Another point I haven't seen mentioned much is safety. Rail is vastly safer than cars and results in less strain on the medical system.
We could bring down the cost of the taxi by putting more people in the car, to share the cost of the driver. That'll bring the costs down significantly.
If the car is sufficiently large, we can get, say, 50 people in a car with a single driver. That should make the extra cost of the driver split between the 50 lassengers significantly cheaper.
We could go further and link multiple cars together, with a single driver up front. They will be driving on one another's slipstream vastly improving fuel efficiency which will bring down costs even further.
Imagine if we can get them to run on some sort of rail or metal track, which makes rolling resistance of the wheels basically 0. No more expensive rubber tyres that need replacing and yet again improved fuel efficiency. This will bring down the costs even further!
And if we put those rails in a tunnel or on a elevated structure we can automate the whole process and get rid of that driver. (we cannot automate anything where humans or animals might get in the way - it remains to be seen if we ever will)
Another point I haven't seen mentioned much is safety. Rail is vastly safer than cars and results in less strain on the medical system.