She acknowledges in The Cut piece that her albums had no consistency or sound but she makes it sound like that was simply endemic to being a pop star and... it's not. That was a Jessica Simpson problem. Britney Spears identity was established early on and while it evolved naturally, she wasn't in search of a new sound every time she made a new album. Same with Beyonce. Same with Rihanna. Same with Katy. Same with Mariah.
I realize I'm comparing her to women considerably more successful as artists than she was, and the ever changing sound of Jessica was down to her label thinking the last thing didn't work and so she needs to do the next thing. But that was about Jessica and the people around her. It wasn't about her making pop music.
I also had to roll my eyes affectionately at the talk of Ashlee being a rule breaker and doing whatever she wanted. Autobiography - its roll out, themes, and image - was as Pop Star by the books as it gets.