Who needs a cork screw anyway?
A hard core wilderness survival scenario does not typically involve bottles of wine.
But there are other sides to life than strict hard core wilderness survival settings. Life should include things like good friends and bottles of wine. Having a cork screw is more a statement to this attitude than an actual nescessity...
To me, it makes sense to carry a swiss army knife (or multitool) with a cork screw on a regular basis - and in particular taking it with me when camping, picnicking or canoeing.
I have never used one in the field.
Field can mean a lot of things, including combat experience, which I don't have, so I'll avoid that term for now.
I've used the cork screw in the bush/wilderness - for it's intended purpose as well as a poking instrument. Surprising how useful a poking instrument is when you have to fix things. And yes, there are tons of things other than a cork screw that can serve as poking instruments.