I think a lot of it is coming from the bird flu scare. If the milk is pasteurized the virus would be killed in the process. If it isn’t killed and gets transferred to a person it can be deadly. The chance of death varies drastically though. Worse than covid odds, but up to ridiculous levels if someone is pregnant.

Basically if a pregnant woman gets it from raw milk somehow, the chances of death for her and the baby are around 90%. So the lack of knowledge of if the spread amongst the cows is being stopped, is leading to the fear of it being dangerous to humans