Because BMIr could fill a different role other than their other interests eg Lufthansa cargo??
Comapring a cargo operation to BMIr is a little odd anyway. Let alone Lufthansa flight training?
Everyone knows BMI Baby / mainline leaks money fast. Not sure why Regional should be tainted with the same dirty brush though.
In reality its not important as Lufthansa are selling, merely trying to understand the reasoning. but perhaps thats where the problem lies, my premise relies on there being reason!