The parents seem to feel at a loss at what to do, they exuded helplessness.
maybe they were never effectively parented themselves, so would not know where to start.
You know, parenting is hard work and you have to be unpopular often, to give kids what they need rather than what they want
My youngest DS had to have a baby tooth pulled last week, despite my being careful with soft drinks/sweets etc. He had one tooth that went bad, and ended up with an abscess. It was very painful to him. We went to out of hours dentist (amazing really, called 111 on a Sunday, could see a dentist that same day).
It was horrible for him, and I felt bloody guilty. Dentists was worried I looked like I was about to faint.
Don't wish this on anyone.
But be careful not to be smug, as it really can happen despite regular tooth brushing and not allowing sweets. Dentist was lovely actually, I did not feel I was given a hard time, just felt supported really.