Answering both of you (I still haven“t learned to use the multi quote button

)
I think there is a lot of wish fulfillment in Charlotte's novels. She herself survived three sisters which she nursed through their illness. Also her unstable and dissolute brother died in this period. And she had to keep household for a father, who according to Mrs. Gaskell, was very stern and exacting, while personally distant of his daughters after they had grown up. And what would you think of an indepedent writer of 39, who, when getting a proposal of marriage answered "Have you talked to my father"? So it is no wonder she went for orphan and unencumbered heroines.
I think also that hers and honest Thomas Hardy“s heroines
are a response to the Victorian ideal of feminility. As Virginia Woolf would say decades later:
"You who come of a younger and happier generation may not have heard of her--you may not know what I mean by the Angel in the House. I will describe her as shortly as I can. She was intensely sympathetic. She was immensely charming. She was utterly unselfish. She excelled in the difficult arts of family life. She sacrificed herself daily. If there was chicken, she took the leg; if there was a draught she sat in it--in short she was so constituted that she never had a mind or a wish of her own, but preferred to sympathize always with the minds and wishes of others. Above all--I need not say it---she was pure. Her purity was supposed to be her chief beauty--her blushes, her great grace. In those days--the last of Queen Victoria--every house had its Angel."
http://s.spachman.tripod.com/Woolf/professions.htm
I agree that Victorian morality was mainly based on appearances. I think Charlotte was both an outcome of it and an influence. An outcome as a parsons daughter, who received a stern education, though the Brontė girls managed to create a playground for their imagination in spite of it. An influence because at least one her novels,
Jane Eyre, became a bestseller and later a classic, surpassed though by the IMO greater
Wuthering Heights.
Sorry for the long post, got carried away by the subject.