AIUI, Peat's concern was the risk of infectious agents. He knew someone who got quite sick from contaminated shellfish, and is cautious.@debored13 why does Ray Peat say not to eat oysters raw? I ate 18 raw oysters today, with 750ml of orange juice. It was a good time.
If it worked out fine for you in the past, then that's great, and you have probably done yourself good.
Next time you might be lucky again, or once in a while not. I think it's a matter of risk-tolerance.