the bay takes themselves too seriously, like there's always something off when they make their mainstream push.
the bay always wants to act like what they're doing is more important than what it is. for instance, calling hyphy a movement was the dumbest shit. a movement is something that moves people socially, not a bunch of people on crank pills dancing ridiculous. people can see through that shit, whenever a bay rapper gets a mic they want to talk about the bay and bay culture, and invariably people stealing shit from the bay.
fans in different parts of the country are looking for standalone personalities not regions they don't live in and will probably never visit. gucci, wayne, waka, drake, etc. all built brands off of themselves, not off of atlanta, new orleans, toronto, the south or canada. where they're from is tertiary to who they are. bay artists lose sight of that and get pidgeon-holed for it.
the people the OP references take the bay sound and have fun with it. it's not a "super movement omg this is a serious thing we invented this and you need to know it" thing, it's just a beat. it's just something for them to convey their personalities with, cause at the end of the day that's what fans are buying into. not the body of water the city their from sits on.