Your notion would also extend to saying "Superman is not ethnically required to not punch hole through that building killing everyone inside, it because the average person cannot punch that hard".
It's is as if the claim is someone shouldn't avoid doing harm that their above average abilities offer them?
The authors seems to be saying something dissimilar to that: people should't not be require to do more than average person, even if they have the capability to do so.
Programmers shouldn't be required to perform code for charity for their friends and family. Doctors shouldn't be required to save lifes.
It's is as if the claim is someone shouldn't avoid doing harm that their above average abilities offer them?
The authors seems to be saying something dissimilar to that: people should't not be require to do more than average person, even if they have the capability to do so.
Programmers shouldn't be required to perform code for charity for their friends and family. Doctors shouldn't be required to save lifes.