I can imagine that, as an Altmer character, you might choose to think of it as ancient history. But when you discover Umaril is returning, and listen to prophets speech, and read the books in the Dibella Chapel... what happens then?
To me it seems pretty unlikely that you'd be motivated to take up the prophet's quest.
AFAIK the Altmer still have as their basic belief system (no matter how worldly or modern they might be) that they'll one day return to Ehlnofey. And you're hearing all the time how Altmer mages are boycotting imperial goods or summoning Daedra.
I guess I'm asking... should I skip knights of the nine? Is it more of an optional quest line for 'good' (and non-mer) characters?
I'm not obsessive about roleplaying but doing something completely out of character isn't me either.