I think it can be done and with a little experimenting im sure it can be done humanly. The first time I seen a parrot chick wearing a crop bra I thought it was the oddest contraption but it served a purpose and the chick wasn't bothered by it. ( A crop bra is used on a chick with weak crop muscles that has been over feed resulting in a pouch that will lead to sour crop and death).
Now its a big world so if this type of incubation is done in certain areas over generations then im sure they have perfected it. They also have probably selectively breed chickens for the task much like people have selectively breed hens that go broody. (selective breeding is as simple as don't eat the hens that go broody).
If you think about what you are asking and where you are asking the question then you can not expect really good ideas. The fact that this is the internet which means we have the technology and infrastructure to communicate means we have money to waste. With money to waste we also have the ability to be judgmental about animal welfare (yet we put dogs and cats in cloths and think that's funny).
I can not think of a way to sound politically correct so im just going to say it. If I was from a poor country and I had 5 chickens and hatching a egg was the difference between my family getting one meal (the egg) or using a method that has been passed down through generations to hatch a chicken that will feed my family for a while then im going to tie the egg to a know heat source and hatch a chick. Either way im not going to be judgmental im just not going to bother trying this method as I have so many other options available.
P.S as for risking the eggs being seen as cruel I must admit I found that funny. This web site is covered in the corpses of chicks that didn't make it while people learnt how to get there incubators to work correctly. If anything less than a 80% hatch rate is cruel then I have been very cruel in the past (dam no more shipped eggs)