G'day Barny, First of all absolutely no offence meant, and without "beer eyes" now; maybe "by default" was the wrong expression.

What I was getting at; is sometimes you can stumble onto something , an idea or whatever just by pure luck, without having set out to achieve it particularly.

My mate Eddie that I mentioned like a lot of successful people went on to brag about how clever he'd been, when in fact the real reason for his success was completely out of his control.

Conversely as you say you have to be there for the "luck" to happen!