And that is the point, if the shares are in some way the legal property of the brokerage, no liquidator is going to wash their hands of them since it would expose them to claims by the creditors. In such a situation you have no documentation that identifies a particular block of shares as belonging to you, a liquidator opposing you and of course the former brokerage staff have other priorities.A liquidator will aggressively try every and any legal means to get his or her hands on any assets in the vicinity of a liquidation. That is their job. They are often very good at it.
The best advice is to register significant positions for the long term in your name.