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:
Legumes: all dried beans, including soy and peanuts (yup, peanuts are not nuts at all..they are a bean!) Dairy: more so when cows are fed grains instead of grass. Research does show transference of Lectins into breast milk and dairy. Nightshades: includes potato, tomato, eggplant and peppers. One of the biggest issues I have with these foods, apart from the damage they inflict on the body, is that foods containing Lectins are something our ancestors just didn't evolve eating.