That is a really, really, narrow viewpoint. I think what people would prefer is that if you query "Scientist" that the images returned are as likely to be any combination of gender and race. It's not that a group is "fragile", it's that they have to specify race and gender at all, when that specificity is not part of the intention. It seems that they recognize that querying "Scientist" will predominantly skew a certain way, and they're trying in some way to unskew.
Or, perhaps, you'd rather that the query be really, really specific? like: "an adult human of any gender and any race and skin color dressed in a laboratory coat...", but I would much rather just say "a scientist" and have the system recognize that anyone can be a scientist.
And then if I need to be specific, then I would be happy to say "a black-haired scientist"