I feel that is why we see so much "commentary" now from referees within the professional game. By vocalising what they see I think they are publicly rationalising what they see.I'm not sure they do. They are without doubt quic ker than most of us. But I do wonder if they referee to pictures in their head - they have pictures of what is legal and illegal, and use that to guide their decision making.
A lot of referees process linearly - tackler, ball carrier, jackler, other players, strictly in that order. The better ones can parallel process multiple things at the same time. Some look at a picture, tell you it's wrong, and then have to work backwards to tell you why.
The comment about Owen Doyle "He also took exception to Gardner's comment of "great roll away, number 10" is an indication of changes in time. https://rugbyrefs.com/index.php?threads/rucking-out-of-control.23088/post-395300
Also the linear appreciation is as a result of the training and guidance, if the tackler doesn't roll ping them, if the ball carrier doesn't release ping them, if the jackler goes off their feet ping them but in some of these where it does occur so quickly, one thing cannot be achieved because of the other action. The smarter players always have and always will exploit this, the jackler pressing on the ball or pulling into the tackled player whilst shouting "ref he's not letting go!"