However, these games share a lot in common, usually including a focus on Moves. The GM determines if something is a Move or not. If it's a move the player gets to roll for it, and if it's not a Move, it just happens. Moves tend to cover very broad areas of actions and are lot less specific and nitpicky than D&D rules.
Unlike D&D, the GM also has Moves. These moves are usually tailored to the particular PBTA game and generally include various ways to keep pressure on the players in a way that fits the theme and setting and mood of the particular game. It codifies the GM's job in a way that makes it more approachable for many. D&D is among the most difficult systems to GM and it leads to a shortage of people wanting to GM vs those wanting to play. Experienced DMs over many years learn to be a little looser and how to wing things and improvise and make the jobs easier for themselves. PBTA games are designed to teach the GM how to do this from the start, partly by teaching the players that this is expected and correct.