Quote from the article:
“Simple chiropractic checkups now can have a lasting impact on your child’s long-term health,” DeMoss’s website reads.
---Well, that much is true... :-)
My experience with those who believe in chiropractic is that they have suffered a subluxation of the BS detector, and there is nothing you can do for them: their belief in it is as unshakable as the belief of creationists or flat earthers. And like those people, they did not come to their beliefs via evidence, and therefore won't be dissuaded by evidence.
Nowadays I just can't be bothered anymore: I let Darwin sort it out.