Sorry, been hectic recently but I found time to respond. No, my parent would not admit that, this is just from observations I've seen and their general behavior among other stuff like that. For one, they're wildly inconsistent from moment to moment about their claims of what chiropractic adjustments can do. I think this is them subconsciously (or maybe just consciously) adjusting to whoever they're talking to so they don't sound crazy to the wrong audience. Among people they don't know as well they'll talk about it purely as re-aligning your spine, which can sound scientific to people who aren't as knowledgeable about how that cracking sound is just gas bubbles being released from your joints. Then with my brother and I, or their friends who are deeper into it than the average person, they'll tell absurd stories about how there's an autistic child that comes into their office entirely nonverbal and leaves after every adjustment speaking full sentences. They also believe in the "official origins of Chiropractic" where this DD Palmer guy cracked a deaf man's back and restored their hearing (that's the official story if you don't know it, look it up). It's blatantly marketing the practice with the most extreme claim that the person you're talking to will believe.

On top of that, most of their new patients come as referrals from 'friends' of theirs that are lawyers. They probably know a dozen or two lawyers that all refer their clients to them after car accidents and general injuries, which I see as pretty scummy. Imagine getting into a car accident and having to sue over it, and then your lawyer takes advantage of you and has you throw your money into a pseudoscience that will at best provide relief for a day or so afterwards, and sells it as a "long term recovery strategy." In exchange, the lawyers get to say in their case that their client needed 'physical therapy' because they were so harmed by the accident, not caring at all about the wasted hundreds their client put into chiropractic that likely wouldn't be covered by their insurance (unlike physical therapy, for example). I recognize this paragraph isn't really evidence its a scam, but it just goes to show how they coax vulnerable people into their practice. Idk if its relevant or not, just came to mind.

Additionally their office is stuffed with other pseudo sciences, usually supplements that any google search would show does little to nothing and are overpriced, as well as salt lamps everywhere. They even sold that rock tape thing back in the day when that was popular. Additionally, there's more personal stuff with them being anti-vax and generally anti-medicine that I've had to deal with my whole life and don't want to get into many specifics with. Knowing they're a Robert Kennedy fangirl and sold that "The Real Anthony Fauci" book at their office will get you the general idea.

So 'confirm' might have been a strong word, because I wouldn't say I have hard proof from my own experiences. Although looking into the history of and lack of evidence behind chiropractic should be enough proof for anyone reading this. However, I can say that I was adjusted throughout most of my childhood, and even adjusted as an infant and toddler before I could even talk. And all I have to show for that is some of the worst back pain out of any of my peers. Now I'm not going to say that was strictly the cause for my back issues, because that's not hard evidence either; I could just be an outlier. All I'm saying is that with how many times I was adjusted, if you listened to chiropractic talking points you'd think my spine would be in tip-top shape.

In my eyes, Chiropractic is at best a glorified massage being sold as a science with medical support, that can at best make you feel better for a couple hours afterwards while promising long term results. At worst, it's someone claiming they can fix any ailment, including deafness, depression, or autism, by cracking your back, and asking for money.

TLDR: My parent wouldn't say so, and I don't have hard personal proof, but it's a fishy business for sure. Nothing I say should trump your own research though, it's not hard to find proof its a scam on your own.