I see it this way. Most trainers do not have adequate training. It is hard to make a living if you do not know what is needed to look like a professional. Your profit depends on your expertise. Trained organizational development specialists receive top dollar for their services.
Diversity training is a special area of organizational development.
Anyone making less than these prices are underpaid. The hidden truth about why diversity trainers are underpaid. Whether to charge hourly, daily, by the half day, or otherwise. Most diversity trainers learned their trade by taking a course or two here, a workshop there, and listening to audiotapes. Traveling to conferences and workshops is expensive alone.