Cornwell simply follows the evidence available

Well, duh. And you hold that against her?

She rounded up a lot more evidence than was EVER considered by the authorities of the day, she came up with art that portrayed the murders, she even came up with remarks by the man himself that Jack the Ripper was staying at the hotel or boarding house where she tracked his history.

To not accept the rational information she provides is to say you'd rather buy into the myth of the day. That worked, back then.

SRS