It’s been tried.
I have been through this in great detail at College.
Every so often, some bleeding heart whizkid comes up with a new efficient oven for 3rd world people, and sets off on an adventure to get them to use it.
What he or she finds EVERY TIME is that those people don’t WANT his contraption, because the traditional ways aren’t just for cooking food - they also provide warmth, and a central family point around which to gather.
Every major College must know about this stuff. Been tried, fails EVERY time.
Like the "Tupperware Party" scene in Airplane!