If anyones problem is with newb players becoming a nuisance because they may think that by playing casual they are good enough for raids, therefore making finding a good pug more of a lottery, then take that particular issue to the devs. This doesnt have to mean casual is bad or wrong or a mistake. Infact the idea that anyone is belittled for choosing their type of gameplay is appaling. Let people enjoy the game they way they want it. That works both ways for people being allowed to play casual and for vets who want a distinction that means casual doesnt flag raids encroaching on their gameplay with inexperienced players causing more wipes from them.