Well, she does have a very clear purpose in writing that article (which falls in line with the purpose of her blog, so no surprises there). It helps to illustrate a couple fundamental concepts:
1) You can not "be true to yourself" if you have not "become". Particularly young adolescents have not completely defined who they are, even if they have some characteristics nailed down. At that point, they can not be true to themselves because they have not found/established themselves. Mrs. Blogger understands this, even if she can not enunciate it (full disclosure: I skimmed the article). As a result, following her purpose, her solution is to reinforce a specific identity onto the youngling. Which brings up:
2) We like to project our identities on others, mold them into our own images. This tends to be unhealthy, because even if one does not know who they are, they very often can recognize who they are not. This dialectic and the projector's unwillingness to accept that they are mistaken lead to familiar conflicts, manifested in such cliched phrases such as, "You just don't understand" "I've been around the block a few times, and I've realized that" "You're being corrupted by leftist/secular/atheist ideologies!" and so on and so forth.