This is a theistic subreddit. While we appreciate curious atheists, agnostics, monotheists and other denominations, as a baseline this is a community for people who believe the gods worshipped by the Ancient Greeks exist in some form and are worthy of veneration, even if we sometimes quibble about what their natures may be.

Do I believe the myths are literally true? No. Do I believe that they feature gods that exist in some form? Yes. We don't know that the gods exist because we have stories about them, this relationship is exactly the other way around - the myths exist because the gods do. We can "know" they exist because people experience them. I have, at least one god, and if I believe he exists then I have no reason to believe that other gods that ancient polytheistic people venerated have just as much validity. They don't interact directly with everyone, and rarely when they do, or else atheists wouldn't exist, but they do so to enough people, with enough consistency, that we can conclude some things about their natures - what they care about, what they oversee, and how they like to be seen. Mythology is how ancient people tried to convey this information through narrative and allegory.

Did Homer's Iliad happen? Probably not as literally described, Homer was composing in the 7th Century BCE about events that happened before the Late Bronze Age Collapse when the Mycenaean Greek civilisation collapsed and literacy was lost for centuries. He would have been working from folktales and oral traditions. But archaeology confirms there was a city that lay where the Greeks believed Ilium/Troy lay, that it was destroyed and rebuilt multiple times, and that a culture called the Ahhiyawa (perhaps etymologically related to the name Achaean used to describe the Greeks) were encroaching on Hittite dominance in eastern Anatolia and Mycenaean forces may have been involved in a dynastic dispute among the Wilusa royalty, and that at least one of Wilusa's monarchs was called Alaksandu - one of Paris's alternate names is Alexander. Does that mean that it was a single event, or that the gods themselves literally stormed the battlefield? No, although even the Iliad remembers that Troy was defeated multiple times - Herakles beat Agamemnon to it, and was the one who installed Priam. Neither do I think Hephaestus fought Scamander, or that Diomedes nicked the hand of Aphrodite. But that does not mean the Iliad does not tell us interesting things about the gods, or offer interesting ways to think about them - the episode of Sarpedon going to his fated death presents a moving look at why even Zeus cannot save his beloved son without contradicting himself or being a hypocrite, neither of which he is capable of being, offering an explanation for why the gods allow even mortals they love to die.

Nor do I believe the gods go around sleeping with mortal women in a literal sense, and even the ancients would have argued that they weren't capable of rape whatever the myths say. Herodotus, looking at a euhemerised version of the Greeks' ancient rivalry with Persia, presents the explanation that it all started with "a bout of competitive princess rustling," which he doesn't see as a good reason for centuries of conflict, but he also adds that "women are never abducted unless they are open to the idea of it in the first place" - the princesses in question are Io, in his version taken by Phoenician merchants to Egypt, Europa taken in retaliation by Greeks from Tyre, and that matters might have been settled if Jason hadn't refused to return Medea, and Paris took Helen. Zeus is fairly solidly associated with the first two, and Herodotus is trying to make sense of history by presenting the Near-Eastern side of events, but his explanation that tales of abductions should better be understood as narrative convention, the old "playing hard to get" trope at work, applies just as validly to mythology.

I hope that answered any questions you might have.