Large hotels use the GDS to distribute content.
The GDS is expensive and doesn't do anything to increase volume, so smaller hotels shun the GDS and use HRS, hotels.com, Expedia, booking.com, etc.
Corporate travelers get upset that they don't see their favorite hotel in Sao Paulo in Concur and complain to the travel office.
Travel office enables booking.com content in Concur to fill the gap left by the GDS.
Traveler gets angry that booking.com rates don't always include points.

Round and round we go.

Sure, it's the company's fault. But also, it's the GDS's fault. And also, it's the hotel industry's fault.