Some additional elements in my opinion are probably as follows.
1 ~ theologically this is a way of demonstrating that our "spiritual lineage" - people to whom revelation was revealed and who talked about it - was specific and providential amid contingencies. Besides A&E there is brief mention of revelation to Abel, Cain, Enosh and his contemporaries, Lamech, and many others. These revelations foreshadow the revelation that we have now received, if our churches are talking about it well enough!
2 ~ A&E and their circumstances were the furthest back piece of history that was being remembered. Thus the spiritual meaning of "first ancestors" could be hooked onto them as a sort of visual aid.
3 ~ The damage of sins (bad boundaries) and what is instrumentalised thereby, to relating, psychology and epigenetics is so universal, we cannot avoid it. That is what God's wrath is against which is why He foretells His way of saving Christ and, through dual-action Holy Spirit, us all from these effects.
4 ~ Anthropologists have taken to calling some actual hypothetical persons from (at one estimate) 80,000 y a or before, Y-Adam and Mito-Eve as a mnemonic for how various fields of knowledge have been unfolding together. This is not meant to convey specifically that the A&E in Genesis are necessarily the very same ones nor to actually disprove a range of ideas either.