As it is clear by my research of this word "myth" is an "unfounded false story."
Yet, the history of the word "myth" is also significant.
For instance, in wiki's POV, "Myth is a folklore genre consisting of narratives that play a fundamental role in a society, such as foundational tales or origin myths. Since "myth" is popularly used to describe stories that are not objectively true."
The "links" in wiki's POV are significant, too.
In my opinion, the idea that the untrue has a purpose and an intent means that "myth" is a word meaning with considerable significance, even perhaps, promoting certain points of view, may be an aspect of the word "myth" that should be considered when utilizing this word in a sentence.
As I have noted in my past posts, words of importance in this 21st century, ostensibly tend to be "nouns."
If I may suggest, when using a word that is a "noun" like "myth" in your sentence, perhaps it is good to consider the importance of what you want to say, even, that somehow, you have been influenced by a campaign of sorts to affect your point of view.
And therefore, you may not be totally inclined to believe what you are intending to suggest.