This is an issue in the US, and there is a recognized need for professionals in all fields to better reflect the diversity of our population. Some college programs make an effort to find diversity, some do not. I think the issue is related in some part, still, to racism, and in some part to cultural differences in how mental health problems are viewed and handled. One problem, and I know I had a lot to learn when I worked in diverse settings, is the lack of knowledge we white Americans have re: other cultures. This was brought home to me when I worked in a women's prison, and a Hispanic woman came to see me often with c/o abdominal distress. I was unable to find a physical cause (other than the stress of incarceration/change in diet) until I responded to her cell one day, and a cellmate explained to me that the woman's son had gone into the army and she did not know where he was---Once I was able to get that information for her, and she had contact with her son, the GI distress resolved. She did not share her distress with me because she did not feel it was appropriate to do so... And, when I worked at a prep school, a fellow-nurse predicted that I would see some of the Korean students around the holidays as they were not going home but that, culturally, it was not acceptable to express homesickness ---sure enough---
I know that cultural norms change over time and in light of the place we are in; but I am sure some of my behaviors/expressions would be misunderstood in another culture. Being the 'dominant' group usually means, also, being less knowledgeable about minorities; they need to understand the majority to get ahead, we do not have that pressure...