Because many people, including myself(even I don't like it though) recognize crits as a part of the game and the current weapon balancing(some weapons have no crit for a reason I guess). I can't imagine how the fixed weapon spread could negatively impact the gameplay in any way.
I am also a casual player. I am here asking this with a poll because I have much fun playing with shotgun when no spread was enabled. Seperating the vote from the no crit would be also cool.I don't think that's what casual players want.
I prefer this option, taking out the option to vote seems a bit drastic.They could be enabled by default and you could leave the votes in but then it's not much different from simply voting to enable it