Part of what a myth does is foster a spiritual and emotional connection to its subject matter, often by compressing and simplifying the subject matter itself and then exaggerating that simplification for good effect, so that myth is often associated with falsity, which can be a problem, though that is not what good myth is meant to do.
Good myths attempt to capture the deep tectonic movements of archetypes, which describe patterns that oscillate cyclically, possibly for centuries during the course of a civilization's lifespan, in the hopes that audiences can harmonize with those patterns and live better.
One may get a warm fuzzy feeling for a certain myth, or a bad foreboding feeling for another, and then perhaps those feelings will accord with energetically similar real world movements. More complicated problems arise when one has to judge those myths: as collectively constructed for certain purposes, whether benign and constructive or malignant and exploitative, as having a certain age and relevance, and competence in construction, and so on.
