In rich countries two-thirds of the cost of bus service is labor. When labor is cheap compared to capital it's more feasible to have a larger fleet of drivers and buses to keep wait times low. (Cheap labor also means it's feasible to have more diesel mechanics to keep fixing buses well past the 12 year service life benchmark the USA uses). Building a rail system is extremely expensive as they can't offload the cost of cars to customers, and can't reuse an existing right of way. But once built the capacity is unmatched and you only need one driver per train which can have multiple cars each holding 200 people versus one driver per bus (40 riders)
In Anglophone countries governments provide in kind subsidies to automobile users in the form of toll-free highways, mandated parking at every building, and general revenue tax dollars to pay for road costs not covered by fuel taxes or registration fees. Because buses are the cheapest and slowest option the clientele is self-selected as low income. This creates a vicious cycle downward. Greyhound ended service in Canada.
In Anglophone countries governments provide in kind subsidies to automobile users in the form of toll-free highways, mandated parking at every building, and general revenue tax dollars to pay for road costs not covered by fuel taxes or registration fees. Because buses are the cheapest and slowest option the clientele is self-selected as low income. This creates a vicious cycle downward. Greyhound ended service in Canada.