It's the
acting part that gets to me. When grown women
act cute or naive when it's not their true self.
If you are naive or are truly unknowlegeable about matters, then yes, it can be cute and appealing. However, there is nothing at all appealing about an intelligent, mature woman acting like a childish fool to get attention or to live up to someone else's idea of the 'perfect woman'.
It's just like being cool, there is nothing less cool than trying to
act cool. It's the same for cute, in my opinion.
Maturity doesn't have to mean a loss of innocence. Mature isn't vulgar, it's a natural progression.
I am mature yet there is a part of me that still believes in fairy's (don't ask

), and one of my favorite movies is The Secret Garden, you don't have to let go of childish fancies, but you do have to grow up.
Like I said before, childishness belongs to children.
I just think this 'cute woman' or the 'Yamato nadeshiko' is a caricature of what a real woman is or should be.