Why do many parents, upon learning that their child has bulimia, begin to harshly criticize him and accuse him of lack of will, and not take him to a psychiatrist?

Because in 90% of cases, it is the parents who are the cause of bulimia. Parents can give double messages, like "come here, go from here", they can control the child, they can not make him feel important, they can force him to do only what they consider important, they feel ashamed when they see their imperfection child (this may also be a reason not to admit your mistakes, but to consider bulimia a child's fool). Parents also, at the expense of the child, reduce their anxiety, increasing it in the child, which in turn intensifies bulimia.

You can read more about the causes of bulimia here.

It happens for various reasons: fear of a psychiatric diagnosis, fear of a doctor, fear for a child, fear for one's own failure, etc. And, yes, the concept of punitive psychiatry is very strongly influenced.

More precisely, attribution of psychiatry is precisely a punitive function, and not a supporting and helping one (unfortunately).

It can also be displaced aggression from ourselves to the child: well, that is, they did not save, they missed, they did something wrong. But they cannot admit, but there is anger and aggression, and this is transferred to the child. Just from fear, confusion and guilt.

Because the population is totally illiterate and tries to solve all problems through reproaches and scandals. People do not understand the mechanisms that cause chronic stress and depression, because they were brought up to ignore internal feelings and state of mind, with phrases like "work, not think."

Neurotics educate neurotics, stupidity and ignorance generate itself. Such a sad truth.