You don't know, so stop saying that you do. People expected extra content of some kind and yes they may have foresaw expansion packs but they're not only going to do expansion packs. fallout 4 needs these "filler" content whether you think so or not.
People don't even know what kind of content are even in the first two dlc's they're making assumptions based off an image and price. That doesn't mean anything.
You forget the gaming industry is a business and money doesn't grow on trees. These sorts of things needs to happen as an option for people who want to buy them and to help the development costs for other dlc's, and sadly these types of dlc's are successful.
Skyrim needed them desperately, fallout 4 should have them in my personal opinion. Whether people go overboard crying about 2 dlc's who are probably just trolls doing it to cause problems doesn't really matter. Bethesda will continue to do what is best for business and provide us with content. Outside of the horse armor pack and not giving all the dlc's for playstation owners in 2007 with oblivion they have always pulled through with dlc's.