Public services don't need to make money. What we spend on those services isn't "losing money", it's spending tax money on a service that benefits all of us. Train (and bus) lines reduce traffic, cost less, and fuel commerce along their routes. Your estimate of what's being "lost" doesn't account for the economic gains that come along with public transport, which is estimated at 4x the cost of investment: https://www.apta.com/research-technical-resources/economic-i...

Spending that by funneling it into a private service (privatization) usually results in worse service at a higher cost. Specifically funding Uber reenforces building the city out for cars, rather than for people, making it more expensive to properly fund public transportation.

Public transportation is heavily subsidized. But liquidating it because it’s not profitable would cause extreme traffic congestion. The city would cease to function. Buses and trains are a multiplier for capacity.

Private transportation is also heavily subsidized. Usually it’s in indirect ways like the government paying for roads and airports, mandating parking minimums, and keeping driver licensing lax. There’s rarely direct budget line items to keep fares low. But make no mistake marshaling capital and land are huge subsidies.