Not gonna play them if they include their launcher after game is started from Steam lol.
EDIT: I am very happy to hear that everyone hates them. EA as well as Rockstar has shown that their launchers are shit. On Steam Deck EA games often fail to start at all due to EA launcher updates, and Rockstar launcher takes around 3-5 minutes to start a fucking game (which should start instantly).
Battle.net launcher can literally be closed after the game is running. It even has a setting to automatically do so. Why would they pull this sort of bullshit, I have no idea
Pretty sure it either allows to login within game, or launches their own (micro?) launcher first, where you have to login with Blizzard account and then starts the game.
Pretty much all "steam games" that are primarily available elsewhere run this way using mini launchers...