It is very patronizing to think that these Kenyans have those kinds of opportunities, and have foolishly traded them in for a job writing essays. This is the best opportunity available to them at this time, and it is being taken away from them. If you think there were better opportunities they missed, then you are implicitly saying that they don't know what is best for themselves.
Having said all of that, let's not overstate the difficulty of writing college level essays, especially essays that are good enough for someone who isn't able to write such essays themselves.