The article gives a good reason for why it works in Taiwan, despite its problems:

> Taiwan’s high-speed rail system proved reliably profitable — and popular, with 64 million riders last year.

Aside from talking about the (potential) cost, you didn't make any other point for why there shouldn't be a HSR. It's fine if you don't think we should have one because it's becoming too expensive, but I don't see any argument for why it wouldn't be useful.