You make it sound as though there's no running water, indoor plumbing, electricity or central HVAC in Africa. I'm sure that should Harry and Meghan relocate to "a poor African country with a baby" they would have all of those basic amenities not to mention a gated, fully landscaped and luxurious modern compound with access to the best doctors and health care possible. In other words, exactly what they have in the UK, or could have in Australia, Canada or the US.
However, I don't know that I think this story is entirely a hoax. There have been persistent rumors, dating back to before either William or Harry was married, that Harry would love nothing more than to "run off to Africa" to live his life. It's hard to separate fact from conjecture, especially when it comes to the BRF... I will say, watching the video of this morning's arrivals at St George's Chapel, it's painfully obvious that there is something amiss between William and Harry.