
I‘m not saying mistakes weren’t made, for example, if they had made the train just 10mph slower, at least one of the four major geographical boondoggles the route is currently in could have been partly bypassed, for example. Targets were too ambitious without domestic HSR experience. But HSR is expensive, and that cost is driven by track miles. In states like California, land cost and infrastructural complexity (relative to geography and seismic activity) are what balloon costs.
Currently, HSR costs on average about ~$125 million per km of track. That’s pretty expensive, and probably should be a bit less if certain mistakes weren’t avoided, but it still falls within the range of cost per km for Japan, and they deal with some similar issues. And also zero miles is incorrect. There’s currently a 171 mile corridor that is in operation. Is it probably the most useless portion of the route? Yes. But it’s a lot more than zero.