Let's just agree to disagree here, Young Wolf. Or better yet, we could both agree that I'm right and you're wrong- whatever you're comfortable with.
See, if you cut out Sansa's chapters, for example, you wouldn't find out how much of a swine Joffrey is, how conniving Cersei is, the history behind Sandor Clegane, how Joffrey dies, how Jon Arryn was killed, etc. etc.
If you cut out Arya's chapters (Heaven forbid), well, for starters you'd lose a cool character, and you'd never find out what is going on outside of King's Landing and the battlegrounds, not to mention all of that delightful business with Jaqen H'gar and the
valar morghulis code. Arya is going to grow into a much more interesting and important character, just you wait and see.
Also, in regards to your thoughts about them being added just to provide a dash of estrogen to the pages, I don't think so. They're too well thought out for that, and you just gotta have those roses among the thorns.