You seem to interpret this as a problem. However, I've read many times that it's basically a solution, because what it means is that production is responsive to demand in a far shorter timeframe than conventional oil. On top of that, supposedly you can drill a well and not complete it until a price war is over.
So I'm not sure why you think "non conventional oil industry is [doomed] to go bankrupt" when not only do people in the industry say it is relatively easy and cheap to put resources on hold, but obviously the sources of conventional cheap oil tried their best to kill the newcomers and failed, only a few years ago. According to both theory and recent history, your prediction doesn't make sense to me.
However, I have no experience whatsoever in the industry, so maybe you have some expertise?