The info for the aggadeta tag is:
Non-legal passages in the Talmud and other Rabbinic writings that use descriptive allegories and stories to convey fundamental truths about reality, as well as theological and moral lessons.
However, this statement about the deep significance of the aggadot seems more more reflective of the likes of Maharal than his predecessors (I am not unaware of Rambam's introduction to Helek). It certainly does not do a good job of reflecting the view that the aggadot were sometimes just used to wake up sleepy students, and the like.
(For a by no-means comprehensive survey of classical views on aggada/aggadeta/haggada/midrash/drash (terms used interchagably by Rishonim, see Belief in midrashim)
I am therefore seeking an edit that avoids taking a stand on the issue (leaving that instead to the website itself.