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).
In-app purchases, mtx, DLC, and premium currency are also subject to Valve tax for games that are on Steam. Free to play means "enough people pay $200+ that we can get away with not selling it for $50", putting it on Steam still means Valve gets a piece of the pie.
Battle.net actually launched in 1996, though the client as it existed back then would hardly be recognizable as a launcher/storefront today. The modern client launched in 2009.
Battle.net is dead and gone. The launcher has nothing to do with battle.net and everything to do with attempting to harvest as much data as possible, bonus if you run it in the background without playing any of their games.
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...
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).
I mean, this sounds suspiciously like something a company that makes the device that also owns and runs the biggest digital game store might do intentionally.