There are car lobbyists of course but the streetcars in LA at least were put there by housing developments to sell suburban homes before most people owned cars. Once the homes were sold the corporation that built the rails had no incentive to maintain them, and eventually they were spun off and went bankrupt (of course competing with cars didn't help)

Nor did the fixed price controls they were often saddled with. It seems that politicians are congenitally completely incapable of considering inflation indexing as a concept when they are writing laws.

Street cars are a red herring anyway. Because street cars don't maintain anywhere near the same number of routes as free-form roads. It is a routing problem still, and railed vehicles perform much, much worse at it, which is why they need to be time multiplexed with rail schedules.