The reason I'm no longer convinced is that such simplification carries with it a component of convenience that makes it awfully easy to isolate ourselves from those who may differ from our thinking and outlook and it seems to be human nature, backed by an awful lot of history, that we prefer to avoid such inconveniences in favor of reinforcing our preferences.
The problem with avoiding the inconvenience of being exposed to different thinking is two-fold: isolation bubbles that allow us to come to beliefs absent any real opposition which leads to intellectually weak conclusions and an exposure to the overwhelming commonality that most people have with each other absent a few contentious beliefs/ideas. The lack of recognition of such commonality allows "othering" based on minor differences in a way that simply did not exist in most Western societies of the last few hundred years.
It may indeed be what we wanted but I'm unconvinced it resulted in what we need.