Good Writers, Bad Men. Does it matter?

Does it matter that Larkin sneered in his letters and conversation (fearfully and fretfully, it seems to me) about foreigners and women, that Naipaul made selfish use of people from the beginning of his life, and no doubt continues to do so now? What does it matter that Dickens knew what it was like to be dependent and abandoned as a boy, but made sure that his wife would suffer the same fate?