My 9 month old baby will go to anyone, he’s not afraid of strangers. Is this normal?

My pediatrician told me at my sons 9 month check up that he should be more weary of strangers at this age. He should be able to discern the difference between someone he knows and someone he’s never seen. But my son isn’t that way. He will go to anyone and be fine. He’s only met my in laws twice in his life and he let them carry him and babysit. Is this normal??

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