It's surprising how different people can be affected by disorienting camera techniques and flashing presentation. As children, most tend to be quite relaxed about visual anomalies, but not so much as you get older. I don't generally have problems with shake effects or with flashing/blinking ( other than they are almost always overblown and not necessarily helpful ), but I find first-person cameras that emulate tracking your head movement as you climb over obstacles really disconcerting to the point of feeling ill.
Fortunately for me, that sort of camera is not likely in BG3, but I certainly understand why the OP would want the option to not use a visual that negatively affects them. I'm also pretty sure Larian neither want nor intend to harm their players in any way.
