What about driving a car?

Computers are already driving cars autonomously, possibly better than the average human already, and quite plausibly will eventually be better than the best human driver.

Precisely my point. Say for examples planes, trains or automobiles, humans may make way more errors than a computer does but you can bet your bottom dollar the threshold for allowing computers to autonomously control the above is way higher. Because the expectation is that if it is a computer it ought do it far better/safer.