Well I'm no champion of this theory.. bit skeptical TBH having been shown during some parenting coaching BUT the idea is kids who have a loving, trusting and attentive relationship with their primary care giver will be more likely to trust and seek help from others later in life and vice versa.
> a loving, trusting and attentive relationship with their primary care giver
If you grew up without this, you would not be able to avoid noticing how seemingly effortlessly the people around you have adjusted to adulthood when it can sometimes be a struggle to get over your fear of interacting with other people when you go to the grocery store. Not saying your skepticism is invalid but I would suggest to consider that perhaps the above is a privilege that not all enjoy and what injurious effects its absence may have. You may wonder about those close to you who seem to have trust issues: did/do they have a good relationship with their childhood care givers?
Speaking only for myself, I had a loving, trusting relationship with my parents. It was my peers who taught me not to trust (edit: also school administrators).