No one chooses to become a luo,a kikuyu,a lunje,a waria.. no one. However,the level of education and skill depends on the person.
An employer looks for skill,not ethnicity. Get the skill,diversity is a plus. Merit wins,any day.
On the other hand,if one or two ethnicities dominate,doesnt that mean that those ethnicities are more developed,more skilled?
In my department,out of 20 people,we have abt 10 diff ethnicities,We dont notice that there are diff ethnicities. My firm encourages different cultures,races,ethnicity and interactions. maybe thats why we are that diverse..