She made her bed. Now she has to lie in it.
See, I'm going to respectfully disagree with that last bit.
Amber doesn't
have to lie in it, she makes the active choice to.
Of course, she's as thick as pig shit and her narc brain won't comprehend this, but she could change her current circumstances at any given moment (obviously not her past or damage she has already done to her body, but still) if she cared enough, but she does not want to change. She is comfortable with her leaky legs and sleep aponea because she doesn't want to put the work in to better herself.
And why should she? It's her sole source of income and she knows this.
She's lazy, attention-seeking and manipulative, and her current lifestyle allows her to fester in and monetize her self-pity.
No one cares about her when she's losing weight and seems relatively stable, she has to maintain her flock of haydurs at all costs if she wants to continue to buy her Gucci perfume.
Her shitty upbringing, no matter how awful it was, does not give her a free pass to be a nasty leech for the rest of her life. Everyone, and I mean
everyone, has had their fair share of traumatic experiences. Maybe some have had it better than Amber, but lots of people have had it worse and you don't see them becoming 600lb hambeasts who regularly tamp on YouTube about how bad their lives are.
It's been said that you can't help those who don't want help, and Amber is a prime example of this.
TL;DR: Amber is a narc, and could change but doesn't want to.