One of my colleagues was a chiropractor. After a while he began to suspect that a lot of his patients actually just had muscle tears, not spinal issues. He bought an ultrasound machine, learned how to use it and how to read ultrasound, and found that to be the case. Between that and the constant pressure from management to get customers (because lbr, they're not patients, they're customers), he got sick and tired of it and bailed to become a sonographer full time.
And before people pipe up with "but my chiro is good, they have me do exercises and so on!" that's just regular ass physiotherapy. See a physiotherapist. A lot of people who sing the praises of chiros because they saved them from chronic pain would have gotten the same benefits from seeing an actual licensed physio, who can prescribe the same or even better exercises because they have an actual fucking education.