When I was a kid I wanted to be serious like Daniel Day-Lewis. No one really dreams of being a comic actor do they? Now I realise how stupid that is - and it's because comic acting isn't taken seriously enough. It's a discipline. You know instantly - either you're funny and getting the laughs or you're not.
If I feel strongly I say it. I know I can do more good by being vocal than by staying quiet. I'd have a whole lot more money if I lied but I wouldn't enjoy spending it.