All fair points. I just thought it was a stretch.
-Walt never being spotted by any authorities in the series finale. Everyone pointed out how lucky he was in that episode
-Some of Jimmy's bar cons. Some of those setups were just too perfect--too coincidental
-Mike's plan to kill the cops who murdered his son--many circumstances fell easily into place
There are many more but you get the idea. Since Breakin Bad and Better Call Saul are known for being rather comical, I give them a pass for things like this--they're known for being silly at times.
The best way to explain those scenes away is this: "It's Mike. It works because he's Mike." It's a joking way of explaining away stretches like these.