If what you're saying is 100% accurate, UHC still created, enabled, and incentivized an environment that led to some nursing homes to commit these horrible crimes. At best UHC should be considered an accessory to these murders.

I'd be very surprised if this possibility genuinely did not occur to them during their decision making. But the model they created conveniently puts the purported blame in the hands of other entities, so there was really no incentive for them to come to any other solution.