They don’t even have to kill anyone on purpose. They just have to force people to undergo experimental autism cures, which have historically killed patients. An example of this would be chelation therapy, aka using the medication used to remove heavy metals from the body under the (unconfirmed) assumption that autism is caused by heavy metals.
If a database is good enough to connect pharmacy records, medical records, and even health info from smart watches (which a doctor or insurance company would not have access to) then it would need to link patient info together in a way that’s not as anonymous as they claim it to be. Theoretically, this could be enough information to force someone into doing these experimental treatments in order to keep their driver’s license (even if they’re otherwise high functioning enough to not be hospitalized) or force someone to be hospitalized with promises of being taught to be more independent later down the line.
Everything would get overrun by fake users and no one would feel like they’re really interacting with real people -even if they are- because all the trust would be gone. It’s just not worth it.