When many story-tellers occupy themselves with a social world which offers no great variety of lively action, their stories will probably resemble one another as to many of the major incidents, and if they draw on these limited resources like spend thrifts such resemblances will be inevitable--and therefore not significant.
The artist (I suppose) usually pays for the privilege by some sort of partial insomnia, by the possession of one faculty that will not be controlled nor put to sleep. In a poet this must often be the visual imagination, bringing before his eyes a succession of images which he never summoned, and of which some (it is only too likely) will be ugly or pitiful.
As for Elizabeth Bennet, our chief reason for accepting her point of view as a reflection of her author's is the impression that she bears of sympathy between them--an impression of which almost every reader would be sensible, even if it had not the explicit confirmation of Jane Austen's letters. Yet, as she is presented to us in Pride and Prejudice, she is but a partial and sometimes perverse observer.
Jane Austen's narrative style seems to me to show (especially in the later novels) a curiously chameleon-like faculty; it varies in colour as the habits of expression of the several characters impress themselves on the relation of the episode in which they are involved, and on the description of their situations.