1 ) It's what happens when they use AI to make a game.. yes they did do that and even pretty much bragged about it, During the period BF6 was being finished (2025), EA strongly encouraged/mandated use of their internal AI chatbot ReefGPT as a “thought partner” for coding and other tasks across all studios (including DICE). half the stuff gets cut and launched with 1000s of bugs that still to this day are not fixed 5-6 months later cause they have no idea how to and that much is obvious now, Half the time you blow a tank up and everyone inside hops out and walks away or shoots you like nothing happened to them its stupid there is no getting in / out animation of vehicles etc...
2) its just so you dont need to install the campaign or redsec if you dont want to play it etc, just makes download smaller if all you want is multiplayer or what ever.