The LVCC Loop is bi-directional – it has two tunnels, one for each direction. I'd say the main reason routing is less of an issue for the loop is not because it is "leisure" (strange phrasing, the LVCC Loop is also public transit) but because it is an underground tunnel, which is kinda the point – tunnels have significantly less issues with routing assuming you can get the digging cost to be much cheaper than status quo, which is the purpose of TBC (and so far I'd say they have demonstrated significant progress in this goal).

Definitely agree that a high-speed rail project and an electric car ferry tunnel project are not apples-to-apples comparable, my point is rather that even if you want to call TBC projects "boondoggles" (which again I struggle to see how that is the case even in isolation), the idea that you'd call them boondoggles in the presence of municipal infrastructure projects like CAHSR betrays incredible prejudice (or myopia) on the part of the author.