The difference between a child psychologist and a child psychiatrist is important to understand. Child psychologists are doctors trained to diagnose mental and behavioral disorders, and can provide therapy and counseling.
Not all lectins are bad, but some are (or at least, can be). A subset of lectins that can be found in large concentrations in the seeds of grasses (i.e. grains) and the legume family do have some properties that can make them very problematic for human health, namely that:
Gluten is often found in wheat products including the high sugar and high fat foods we are advised to avoid as part of the Paleo diet. These harmful lectins can attack the body and cause a lot of damage to the intenstine which results in a leaking gut, not to mention a lot of pain. Bad lectins can completely destroy the immune system, leading to issues such as extreme weight loss, diarrohea and sickness.