This was my snap initial thought too but it does not hold up well. Their previous system may not be sanitary by today's standards, could be impractical to access in modern times, or socially humiliating now. Even if all of those were non concerns though I believe we should still be able to provide modern solutions to people requesting them instead of writing it off as "be happy with the solution you had yesterday"

This is Africa we're talking about. That whole continent was the playground of ruthless European colonizers for centuries, and I'm under the impression it wasn't exactly a paradise before that, either. So, probably not.