I’d argue the author vastly overestimates the number of sports fans who want to read Social Justice Warriors writing about sports. Certainly few conservatives want this, but I also bet most liberal sports fans would rather just read about sports.
There was a time, probably, when journalists considered their audience and its tastes. These are not these times. Look at ESPN shedding millions of subs every year, and it just doesn’t make sense to irritate your paying audience.