And nothing says the train must take 30 hours. 12H of highway driving is what, 600 miles? 1000? The slowest high speed rail lines in China have a design speed of 120mph. Some go 240mph. So that 600 mile trip could take 5 hours. The 1000 mile trip could take 8 and some change. Add in an hour or so to account for stops.
Like, I struggle to imagine how every goddamn conversation I have about rail in the US ends up like this, with someone mistaking my "heres what COULD be" with a comparison to "here's what IS". Do you not think that someone advocating for trains doesn't understand how crappy they are right now? That I'm advocating you take the train despite all of the reasons you mentioned its awful? Do you think the fact that tickets can command that price despite taking 30 hours indicates a latent demand?