Yes, but also capitalist conditions which make it so that human beings can't develop normally. For example: look at his clip of snub nose monkeys: https://www.youtube.com/watch?v=yARtExKaIH8

A baby is born, and eveyone is in competition so they could take care of the new baby. If you look at antropological studies of hunter-gatherers, our natural state of affairs shares some crucial elements with this group. A large group of adults which live together and which help eachother with raising a child. This child, as a result, grows up in an environment in which it learns that adults are to be trusted and adults will help them. The current family structure leads to overworked parents which are not equipped for the task of raising a child, which structurally leads to much more conflicts and thus lack of trust (if not trauma).

If we'd organise our society in a way which would correspond to how our species evolved, we'd have a lot less mental health problems.

Just to be clear: this isn't meant to minimize mental health issues or disparage medical treatments.