1. ‘If he wasn’t trying to gain an advantage’ - there’s absolutely no ‘if’ about it; can you explain what advantage he could possibly have got from doing it? Because there is zero. He thought the contest between bat and ball was over (as it in fact was) and was wandering down the pitch. It gained him absolutely zero sporting or competitive advantage.
2. If you mean the ML one then no, that’s not the same and it’s strange that people keep using it when it’s totally different. If someone is batting out of their crease or swings at the ball and misses, falling out of their crease it’s absolutely fine and proper for the wicketkeeper to try and stump them; it’s part of the contest between bat and ball. Can you give any other examples of Bairstow trying to stump batters who were walking out of their crease thinking the over was finished?
3. Cook was on the balcony rather than on the field with the ability to withdraw an appeal. Again, totally different.
4. Yep McCullum did something very similar, and was roundly criticised for it, which shows that many people think it’s a bad thing. He also later apologised and has said on many occasions that he really regrets it and has since reflected and learned better. Unlike the Aussies who are still defending it and saying it’s fine - so once again, there’s a difference. Presumably you think what McCullum did was absolutely fine then?