[turc1656]

The word "want" describes desire, willingness, and a level of interest.

Saying someone or a group of people are not interested in doing something is entirely different than saying they are less capable.

The proper equivalent to "men (on average) have difficulties with emotional communication" for the example you gave would be "women are not as naturally capable as men when it comes to tech jobs."

[toasterlovin]

Perhaps you're undervaluing the degree to which desire promotes skill. Maybe it's that men have difficulties with emotional communication because they don't have a desire to communicate emotionally and, thus, have not built up the skill set.