Jealousy

Gender dysphoria can take on overtones of jealousy; "I wish I could wear clothes like my sister", "I wish I could roughouse with the boys or play with tools", etc. Of course this used to be a more pronounced problem when we hadn't yet relaxed gender norms. 

As a result, people who grew up under a rigid binary were left wishing but unable to act other than in secrecy. This impacts psychology growing up which then needs addressing later. 

If the mitigation method they adopted remained stunted in secrecy the shame and guilt risked not being properly addressed and simply allowed to fester. The psychology could remain rooted in the idea that succumbing to the urges was doing something wrong. 

Here I should note that people with mild to no dysphoria have a shorter path to resolution since once they find a balance point the psychology takes care of itself over time. This is provided that they aren't surrounded by naysayers who make them feel worse about their inclinations. 

Youth don't develop these mental blockages regarding gender because they didn't need to spend years living in secret jealousy wishing they could be fully themselves.

The key is to honestly examine core motivation and coming to terms by applying a solution which then elevates self esteem thus maturing the psychology around the gender variance.