It wouldn't make a difference...it would just be another race doing it
Electricity, radio, TV, light-bulbs, computers, cars, aeroplanes, trains, engines, antibiotics, machines etc were all created by whites. Almost every technology in the modern world was created by whites and every technology you use everyday was created by whites.
Without whites, blacks would be living as if it's still 60 000 BC in huts made of animal faeces, with no wheel, written language, no mathematics, no science, no medicine, nothing. Most only came into contact with civilisation a hundred years ago or even less.