Launching those games launches the launcher. Which then either chain-launch the game, wait for launch button to be clicked, or require a Steam linked login, or

Launching those games launches the launcher. Which then either chain-launch the game, wait for launch button to be clicked, or require a Steam linked login, or combinations thereof. Often the game is the only game the launcher can launch. There must be business reasons it makes sense but experience wise it's a pointless friction.