An unfortunate bevahiour pattern ....
Unfortunately, it seems that Land Rover Australia is open to such dealer behaviour. I am aware of several similar "repairs" which, with the benefit of further investigation and hindsight, appear to be grossly complicated and expensive. But it appears LRA is quite happy to fork out the cost, and naturally enough, the dealers are quite happy to receive it.
The work is probably done thoroughly, but also probably unnecessarily.
That I am aware of, engine changes, gearbox changes, various complicated engine parts, (and now turbine controllers), are all the subject of this behaviour.
Perhaps LRA simply doesn't care (they are probably insured anyway); perhaps they know no better. But the annoying part of all of this is that in the long run, it is costing we owners a lot more for service than it should.
But rest assured; this practice is not only with Land Rover dealers. I personally have had the experience with Ford dealers as well. Cases where enormously costly "repairs" or "replacements" have been rejected in favour of a "short cut" of simpler work which has led to many years of further, trouble free, operation of the vehicle.
It seems to be the nature of the beast.
Caveat emptor