Of course, you are right at about all of those possible setup scenarios, but how often do you think BSM pulls off the combo without being countered? In other words, what percentage of BSM matches manage to play a turn 4 King Tide followed by a successful turn 5 Tsunami? Especially, since only the first player has such an option.
I was just trying to bring some perspective to a non-BSM player about how frequently the combo happens. BSM generally wins, if it’s going to win, by some other means.