The 20 points lead is not a so decent indicator because it’s calculated by an AI not by humans who may have a very different opinion (for example due to a group status)
They can really be arbitrary. Once a close game between 2 six dan. Both thought a group was alive but that was kind of hallucination it was dead. Then I can imagine that to make a few things clear one pass a few times while the other add a few stones. Here could come a surprising win for stalling… This may even more happen with players of a more intermediate level, as soon as the AI estimation is quite different from the players estimation.
So then
Exactly