One very famous incident, in which a felon, already hit in other parts of the body, and still mobile, was shot in the pelvis by a member of the NYPD SOU, effectively anchoring the felon, has been told and re-told so many times that it became trendy, for a while, to recommend a pelvic shot. Somewhere along the way, the word "shatter" became trendy, in reference to pelvic shots.
More recently, the shatter-the-pelvis shot has been quite thoroughly debunked. This does not mean a pelvic hit cannot disable; it is just that it is not the sure thing that some trend-followers have made it out to be. Of course, there have been plenty of failures to stop with COM hits, too. In documented incidents, some recprded on dash cams, heroic LEOs have blindly followed their training, and poured round after round into the COM, as the felon continued to function like a cinematic Terminator.
The obvious answer, to me, is to be prepared to spread the damage to multiple vital points. See the opponent as a living, breathing organism, not as a target with a ten ring and X ring. My employer, a big-city PD, teaches us to treat the COM as the first target of choice, and to treat the pelvic area and head as alternate targets, either due to opportunity or because COM shots are ineffective.
Because heads bob and weave, in the real world, when I train on my own, I tend to practice putting a lot of shots higher than the geometrical COM, quite high in the chest area and including the neck, in addition to actual head shots. This high chest area is filled with important plumbing, ventilation, and structural bits, and, notably, some training methodologies teach these higher-chest shots rather
than COM.
I would probably be more likely to select the pelvis as a real-world target when armed with a shotgun, than a handgun. Moreover, I will target the actual hip joints, and lower spine, not just anywhere on the pelvis.