Buddhism originated in India and spread its branches and leaves in middle earth. Buddhism stresses the afterlife and teaches people to be good.
As for the fake monks and nuns you said, they exist. Personally, I also think that 99% of the monks and nuns in the temples that collect tickets are fake, and they are basically "managers" and "actors" of scenic spots. This is also due to the political system.
However, the existence of fake monks does not mean that Buddhism is a cult, which is completely different and confusing.