But if this was just a normal business operation, and the stated losses were real, then the smart business decision for many of the owners would appear to be selling their stakes. Why don't they?
Well, this is simple. Because they are a collective bargaining session away from turning a business that is not (or marginally) profitable, to a company that is very profitable.
Most of the owners are in this for the long term, and they know that with a new CBA (which they have known they were going to hold out for, for years now), as well as a new profit sharing system (that goes hand and hand with the new CBA) it will be a very profitable business, making up for any losses they have had.
It would be like if a company was losing money because they had negotiated a deal for supplies that ended up being well over market value, but they knew their contract was up in 2 years, and that when they get to renegotiate, they knew the cost would drop considerably. You wouldnt sell then, would you?