many reasons, the first being that public entities would not be in a rush to spend a fortune on ill advised light rail systems which have run some systems into

many reasons, the first being that public entities would not be in a rush to spend a fortune on ill advised light rail systems which have run some systems into the billions with even more in deferred maintenance. light rail is great for connection distant suburbs or major points of attraction like an airport to the city center. however it cannot adjust for changes population needs. only NYC has ever shown real ridership increases in the last fifty years. US light rail has a nearly sixty BILLION dollar backlog of maintenance because it cost to much to build, run, and maintain. what private company would even be allowed into that mess while serving the public? it also probably would not take the NAACP for force a privately run bus line for a city to serve minorities but it did in LA against the government run system. want to extend it further, most public systems are bastions of nepotism where friends and families of politicians place them in positions they are not qualified for to earn big checks and pensions.