There will always be unethical students who cheat. At least the Kenyans were making a living from it. Now that's gone, and the money goes into the pockets of some of the wealthiest people on the planet.
It's the old parable of whether it's unethical to steal a loaf of bread to feed your children.
Of course, this type of fraud is legal for the one doing the work, so even on that front the comparison doesn't really work.
Beats scamming old people out of their retirement money, I guess, but not exactly a job that people will feel bad about disappearing.