Keeping lounges closed due the lack of eligible pax is actually causing that "eligible pax" will not take LH / LX at all.
I am doing exactly that -- until there is no F/HON limousine service and I can not use First/HON lounges, I avoid travelling with LHG.
I am quite sure that I am not only pax like that.
So actually they should rethink their economic reasons. As if high paying pax will not fly, also the income of airline will drop a lot.
I do not choose airline just due frequency (what actually is poor today anyway) and not due price. I choose it almost solely due the service level i get.