Goodwin cost the rest of us something more than £40bn. AND got a multi-million pound pay-off from the taxpayer. He has no reputation to defend, which is why he went for 'privacy' not libel, the grasping little sod. Using our money to do it, as well.
If anything affected his judgment while he was running RBS into the ground, we are entitled to know. If he was behaving in a way that was not allowed under the company's policies, for instance. Or shagging someone responsible for assessing risk, or audit, or governance. Unless Mrs Goodwin knew, if the allegations are true, he was certainly behaving in a dishonest manner.
I remember some extremely kind people on here, when he was first exposed, feeling sorry for him and justifying him having the police guarding his home on the grounds that his kids might be bullied. When actually a. he'd caused the problem, he could have used some of his ill-gotten gains to sort it out and b. turns out he had been betraying his family all along (if the allegations are true).