Choosing to be in the spotlight just underlined what I wrote: she wants to be seen as an individual, achieve something she can be proud of, not "just" being MJ's daughter.
And yes, she knows PR but it's just possible she had to get that off her chest without any goal or intention. Of course it's also possible she wants to achieve something with this statement, who knows. I don't know what's going on behind the curtains...all I am saying is: we always want people not to be harsh on Michael because you always have to look at the whole story and why people act the way they do...context, background information,...so let's also keep that in mind when it comes to his kids, please - or when it comes to anyone, basically.