Why is Greek mythology and religion generally dismissed but the three main monotheistic texts are often taken seriously?

What makes these older, polytheistic religions “unusual” or “less ordinary” to mot of the world? Why, when you list religions in a debate or argument and you give examples, you only give Christianity, Judaism, Islam and possibly Hinduism? It’s like these “main” religions are more valid than the other ones.

They may seem less realistic, but they were accepted at the time when less was known about the world. But now we know more and we know that the gods don’t control the environment, but that same rule applies to Christianity too, but it seems like it is ignored in the case of the “main” religions. Like if a pagan came up to you and said that storms were caused by Poseidon, and then a Jew came up to you and said that storms were caused by Hashem, most people would think that the Jew’s situation is more plausible even though we live in a world that has facts that apply to both religions.

What are your thoughts?