To "disrupt" it in that context was meant in the startup vocabulary, it means to improve some existing thing. The high speed rail project in CA is a testament to the dysfunctionality of that state when it comes to building infrastructure.
My God as if ideating on alternatives is enough to kill a project! What world is this? have you ever built anything?
California's "high speed" rail was still going to take 5 or 6 hours for the SF to LA route. No better than driving! Musk was correct to propose something different.
It's been 15 years since that project was proposed and we're no closer to a true high speed rail between those two cities!