I wasn't suggesting they SHOULD. I was just wondering why they hadn't like Skyteam did in T4.
Major airlines like to have a dedicated lounge, in their own name, at their home base.
But - that apart - I’d say look no further than the reason given by
rossmacd above.. It is not by mere chance that the CX (and latterly, QF) lounge has quickly become the
go-to quality option at T3.