They are building in a strange ass way, but it will connect two major cities when it opens, just not the two you listed. Those legs will come later.
Also, fuck cost overruns being an issue. The initial Japanese bullet trains cost 2x what they were projected to, and all people say about that 50 years later is “when can you build more?”
Same goes for highway cost overruns. No one makes a peep when shitty concrete costs way more than planned, but if a revolutionary transit system that’s climate friendly, cheap and helps the working class has issues? Hell no, the world is ending.
We need to spend the fucking money and get it done.