In my experience, pro-environmental regulation is always passed over a chorus of screaming capitalists pointing out that it makes it very expensive and difficult to build things. There is a reason that China is the factory of the world - it is legal in China to build things cheaply. There are only a tiny handful of people who know how to build things that are compliant with the regulation (& demonstrate that compliance).

So while the last step in the sequence of events is wealthy people suing, the actual problem here is probably that the CHSR may be illegal to construct and there are people with an interest in testing that theory.