I felt the same - very torn. Especially if older pieces are read - almost like reading someone's private letters.
I don't know... is it disrespectful to read Ann Frank's diary? (or Samuel Pepys diary, for that matter...)
Their language was secret so that they could protect each others while they were alive, but now it's all become part of History. They're safe, no one can hurt them anymore...
And women's "secret history" is a perspective we rarely hear about! So I find this quite exciting, personally (although it should obviously be done respectfully)
This (the problem of respect towards people who are long dead) reminds me of a female Egyptian mummy that I saw once in a museum in England. Her body was mostly covered with a sheet, out of decency, and it came with a text asking how should we balance respect for people who lived long ago, with the desire to learn more about their lives. It explained the circumstances in which the body had been excavated and brought to the UK (back when mummy unwrapping was a "fashionable" past time...), and asked whether such mummies should be buried back, or displayed, and how. It was tactfully done, I think.