Binoculars, one of the most litigious societies in the world is the United States. It has operated UNICOM services for over 50 years with tens of millions of movements, and last time I checked with the FAA (about 3 months ago) there was no known litigation against a UNICOM operator.
Surely we can copy something which is incredibly successful, adds to safety, and has no history of litigation. Alternatively, we can create problems which don’t exist and not benefit from this simple extra safety procedure.
By the way, if an airline aircraft is going in to an airport and asks another pilot what the weather is like (which often happens) are you really suggesting that the other pilot is at great risk of being sued? If this was so it would have happened already, as there are literally hundreds of such requests every week in Australia.
Quit trying to create problems which don’t exist - just copy procedures which are successfully used all around the world.