I'm not personally concerned about it, it's just easy to see how someone could convince themselves it's a worry, especially when they want it to be for racist reasons.
> it's just easy to see how someone could convince themselves it's a worry
Trying to make sense of it for myself, I can only imagine it's from believing the reason they're healthy is because they live in a perfectly sterile environment, instead of it being simply because their bodies can handle the impurities of their environment.