Health insurers routinely deny coverage of medical treatments that aren't considered conventional and accepted practices. The link you posted is for a law firm that helps clients fight to get medical claims covered after they've been denied by an insurer.
LIFE INSURANCE is a whole different story. It covers one event -- and one event only: the death of the insured. It's almost impossible for a life insurance company to deny a claim, since there's rarely ever a question about whether the insured actually died.
They dont pay suicides.
They also don’t pay fraud.
They might not pay out if you are in the contestability period.
But yes if any of them would attempt to deny payout,,it would be far more likely to be health insurance tha life insurance.
This is good news for folks who have taken the vax. as more and more of them run into serious problems.