I think you guys are making way way more of this than it is. She is going to rehab because her PR manager is making her. The same as the boxing guy who is going to anger management after being caught using racist language. It's for PR and nothing else. That's what literally every celebrity does when they get caught being a bad human or making bad choices, they go to rehab as an attempt to dodge the social consequences of their bad decisions.
She's a mediocre musical talent who's used social media and flaunting her admittedly nice bod to make a name for herself in an industry where talent isn't all that important. I don't care if she could sing in an a capella group, she's not that great of a singer. The people around her aren't to blame. She is. She's not a victim, she's a social media starlet who's developed bad habits that caused her to embarrass herself. Her bad choices and lifestyle caught up to her. This isn't the first time she's done this, it's the first time it's had consequences she couldn't avoid.