I am not an expert in this but don't believe so as gcam still requires that sepolicy to communicate with hardware properly.
I've tried a few gcam mods, all are suffering from the same issue.
Not sure what the risks are to allow the sepolicy in question or at least provide that option to users so that they could enable it if they want to (accepting the possible risk factor).
I was doing a photo session yesterday and the camera was so slow, especially when taking multiple pictures. My old Notes 10 Ultra blows it out of the water which is a huge shame.