If modernist naturalism were true, there would be no objective truth outside of science. In that case right and wrong would be a matter of cultural preference, or political power, and the power already available to modernists ideologies would be overwhelming.
Once you're in charge of your job, your house, your children, getting the food on the table, doing all of this, all of the time, it'd be nice for someone else to be in charge for a bit maybe.