I regularly harp on about the standard of officiating and player behaviour in rugby and how it compares brilliantly to the utter show you see in football as they're very similar sports in terms of the requirements of officials; as opposed to cricket where it's very different.
And if you look at the Six Nations where officials all have microphones, and you can hear the two-way conversations between the on-field referee and the TMO (VAR equivalent), everything is completely above board and completely understandable to all.
It's VERY rare that a TMO comes out with an incorrect decision - and where they do, it's generally only because of how the on-field official has phrased the request to the TMO (such as "is there any reason why I can't give the try"), which was relatively common early on, but has got so much better in the years since. Yellow cards are quickly checked with TMO to ensure they've got them correct - which would have stopped the stupidity of Lemina's second.
They'll never do it, but if VAR behaved like TMO, then we'd all be in a much better position.