They want to sell the game to 30 million people instead of just 3 million.
Maybe you should back to page two or so where all that was being said was "LOL BETHESDA IS SO BAD AT GAME DESIGN THEY JUST MAKE THEM IMMORTAL INSTEAD OF ACTUALLY PROGRAMING THE AI". The same can be said for the original games, except there was nothing done to cover up the bad AI. Yes, one of the more famous things of the original Fallout is Ian's terrible AI. Why is that something to be proud of? Because he can run into gunfire and practically kill himself? There's a difference between challenging and just purely stupid.
Challenging: Your NPC companions have taken cover and will die if you can't heal them with a Stimpack, which requires you to run out into the open as well. Or something to that effect.
Stupid: Your NPC companions run right into a Super Mutant's mini-gun, blindly, and get turned into Swiss Cheese, and the only way to fix it is to reload or move on without them.
And stop putting labels on people. I am right with you guys on how much FO3 sucked as a Fallout game, despite it being my introduction to the series. I'm not defending Bethesda, nor am I hating on the originals. I'm merely questioning you complaining about something wrong with both eras of Fallout, which is the terrible companion AI.