In my opinion, most people in the valley or in North America still refuse to give up their lifestyle. They look for something like self-driving cars, all electric-powered "personal" vehicle to invest. And those still drive on the same road/interstates/highway infrastructure and don't give you the benefits compare with high-speed rails.
They don't recognize the real priorities - how to transport millions people everyday efficiently, cost-effectively, and most environmentally friendlies.
They also don't recognize local economy, local businesses thrive with these connected network. It is proven to be the case in China and Japan.
High-speed rail network is what people want - to get from point A to point B quickly. It's not something even the most efficient self-driving car with the best MPG electric-powered vehicle can scale for millions of people everyday.
Instead of investing into some new technologies, they seem like they refuse to take decades of proven technology and just use it in US (high-speed trains were first invented in Japan in the 60s)
But as I understand very well in the culture here, the politics, the corruption, and the oil/automative conglomerate will never make this happen for the actual good for the people.
I would without a doubt to say the US is in its downfall as it didn't pick the priorities to fix the root of the problem.