Timing and good marketing. Harry Potter is written for success. It’s the most generic possible fantasy you can imagine but it’s full of clever little gimmicks that hook people.
- A special class of people. Everyone thinks muggles are lame because everyone already dislikes people. Every reader loves to imagine that they could… not be a muggle.
- A magical school completely full of little titbits of wonder. The kind of place you wish you could visit because there’s a magical marvel around every corner.
- Lots of ways to pick sides. What house are you? What kind of wizardry would you specialize in? What teachers are your favorite? Who would you like to be friends with?
- Lots of ways to be competitive. Merits and demerits for your house. Quidditch games. Magical challenges. Classes and grades.
- Lots of ways to imagine customizing yourself. What kind of wand, what kind of familiar?
The whole thing is like a video game that encourages people to imagine themselves as a character alongside the protagonists. Like a character creator you could immerse yourself in the book by picturing what kind of Hogwarts student you’d be.
And that’s what most of the exploitation of the novel is based on. From sorting hat quizzes to buying scarves and wands. It’s all pushing the narrative that you could be a student at Hogwart.
Creatively, the novels are derivative and bland. But the way they’re written allows people to attach a lot of their own meaning. Timing wise they were published when video games and the internet was only just on the rise so there was relatively little competition from other media.
All in all, it’s going to be nearly impossible to replicate the effect again in book form. Other media are just far more popular and suited for the whole 'place yourself in the role of…" type thing.
It’s a book set in Victorian society, aimed at Victorian contemporary readers. There’s a limit to how far you can deviate from the social norm without alienating the readers it was written for.
And there’s a lot of pragmatism as well. If you’re going to perform a new and risky operation like a blood transfusion, it makes sense to start with the big strong male volunteers instead of hassling the staff to pitch in.
Yes, the women thought of being obedient and dutiful wives as was the social expectation of them. So are the men. We start out with Harker dutifully writing to his wife every day. It doesn’t mean the women don’t have agency. Lucy was considering several suitors and had every freedom to turn them away. Mina was putting in serious work managing her husband’s estate and supporting his work as a solicitor.
But at the end of the day, women were dependent on men in Victorian society. And men carried the responsibility for their household on their shoulders. In a good marriage, that meant teamwork like Mina and Jonathan. And like Lucy was hoping for. In a bad marriage… well that’s why women campaigned for equal rights.
While it’s unlikely that Bram Stoker was anything like an organized and self-professed feminist. He clearly thought women could be competent, intelligent, and contribute. But that doesn’t change the time period of his life and his novel.