It was inneficient in the past, yes but the people demanded it.

In the 1800, people were literally dying in coal plants from the carbon gas poisoning, but they all needed a electricity.

People could have just used candles until more safe things come out, but thats not how technology works, they demanded the electricity at the cost of the workers lives, the first ones take the most risk and get the most reward.

Nobody gave a shit about those incidents, it was society's fault not the market.

Some people dies of lung cancer, some people got billionaires, it's luck.