The problem with NBA playoffs cliches is that they are too extreme to actually be applicable.
There's too much nuance in the postseason for those kinds of hyperbolic blanket descriptions. Though the action might be predictable, some so-called truisms have too many outliers to actually be accurate, while others are just downright false.
Chalk that up to how the game is covered. Fans naturally look for patterns, trying to link what they're seeing or about to see to something they've seen before. That said, cliches can be too general or too reductive for the moment in question; they fail to do these high-pressure games justice.
As the playoffs progress, you're liable to encounter most, if not all of these terms. When you do, remember to take it with a grain of salt and keep context in mind.