On a motorbike ? Nope. It's too easy to anticipate what's coming at you and react quickly.
On a big mountain or at sea ? Yep, sure. You can't anticipate what's going to happen in several hours or days with the weather and can't react quickly enough to physically remove or protect yourself from a worsening situation.
Riding like a dick with total disregard to the risk you yourself take or impose on others might be the measure of a man but not in a good, big or clever way.

But I suspect that some of the smartarses on this site would be happy to leave a trail of chaos in their wake and get a small stiffy thinking about it too knowing that they won't have to face up to anyone.
Funny that some folk who think they are the dogs bollox on a bike and in life and who hold everyone else apart from their cronies in contempt seem happy to trust a total stranger with their lives.
If the people carrier had moved over and showed a sign he'd seen 'you' (and if he moved then he would most likely be a biker as all non bikers in cars are cnuts ), then sure - go for it if you feel comfortable with it. It's not the width of the bike but the consequences of a dickhead moving over 2 feet. I've had three occasions in three years where if I'd taken what I thought was a 'good to pass' from a driver, I'd be dead. Not making the move does not make you a lesser man. Or a 'boring' one.
There are some bikers out there who think their godlike abilities on a bike have kept them alive. Maybe it's more dumb luck.
Mutley, are you one of those people who thinks his opinion is always the right one and everyone else is only entitled to your opinion ?
For me personally - and I don't impose my opinion as the only one - I am on a bike as I am in life: trying to do my thing without adversely affecting anyone else.