Yes, this sounds like all the unhealthy ESFPs I know, although even more to an extreme. Basically, her Fi is out of whack. My older sister is an ESFP and she can be absolutely maddening at times to me. Her Fi is really foreign to me, despite being raised in the same home with the same values. Working with Se in the aux-position, it just takes on a different form.
Some examples...
My sister has the SP attitude of not wanting to be judged and living for fun, and so she gets annoyed with people she sees as uptight and restrictive, yet she is one of the most opinionated, judgmental, stubborn people I know. It's even more frustrating when she has no real basis for her feelings. She has been known to say, "I don't care, that's what I think", as a refute to logical arguments against her opinions, especially when coming from a person much more informed on the subject. I agree with sunshinebrighter, re-evaluating her opinions is too much work, and sometimes too scary.
My ESFP sister also trusts her own experience over anything. Her anecdotes define the world, despite concrete proof that they are not the rule. We clash when my Fi values expand globally and theoretically and hers stay confined to her personal, actual experience. She will even deny my personal, actual experience, because she only trusts what she experiences for herself

.
This means you
cannot tell her anything. She has to screw her own life up before she can see what everyone else was warning her about, and until she does that, she will just dismiss everything everyone says. She's short-sighted and cannot see the future problems with her current behavior. All that matters is how she feels in the moment, and this has caused her a lot of pain and heartbreak.
She also dislikes most anything that is conceptual, theoretical, symbolic, or abstract. My sister is smart - it is not that she cannot grasp it, but she sees no value in it. She writes people off who like these things as pretentious and trying too hard to be "deep". Sure, no one likes a faux intellectual, but she takes it to the other extreme sometimes.
On the other hand, I have a good ESFP friend who is not this narrow-minded and stubborn at all. It's really a matter of how good of a handle they have on their Fi.