I'll grant some irony in my original post. However, Orwell agrees that as a saint, Gandhi was required to eschew having sex with his wife (that's the kind of thing that leads to strong emotional attachments, which lead to favoring one person over another person). However, Orwell's point is that most of us don't aspire to sainthood. Far from failing to be saintly because it is too difficult for us, we fail because we WANT to favor one person over another person. We WANT romantic love, and parenthood (both of which are discriminatory and involve nepotism).
As for the nepotism that allowed Martin Amis to catch a break -- I'm no Amis expert (I've read some of his essays, but none of his novels), but if he doesn't write well, we need not read his works. If he DOES write well -- why object that he caught a break? There are doubtless some very good novelists who never caught a break, so we have never been lucky enough to read their books. That's too bad -- but why blame Amis? Isn't it the editors' fault, not Amis's?
Where is the horrid poseur whom high school kids are forced to read because he had a famous father? That would be a bad thing -- but I don't think it is actually a problem.
It is doubtless an advantage for those who want to get books published to be born of famous parents, or to be famous themselves. Look at all the actors and actresses churning out children's books. But I can't believe that it is a horrible thing, or that it has much of an impact on those unfamous writers who want to get their books published. So the only reason to "hate" nepotism is jealousy. But isn't that a negative emotion? Shouldn't we be happy about the success of others, instead of hateful about it?