The Victorian view of women is largely not helpful to the characters in Dracula. This sense of women as domestic, largely asexual, and to be protected (and not educated/trained) leaves the men unwary for the threat posed by the three female vampires, or, indeed, for the kind of sexual temptation they pose.
The sense of women as needing to be sheltered, and potentially emotionally unstable, leaves Mina working through the threats of the castle in a more isolated fashion than she might. Lucy is bitten by Dracula when sleepless and alone; if she'd had more options than marriage, or could be with a man, she would not have been so isolated.
The view that men should and can protect women does give the men purpose and energy, though.
Oh,I guess if you consider Dracula a character, the view is very helpful: they are isolated and don't understand passion, and he can enter their rooms, minds, and eventually bodies without them being able to resist.