

I mean, I totally get it matters more in some cases than others. I'm way less worried when it comes to a study of dynamic scene perception in infants than I am in a study of affective responses to the COVID-19 pandemic. I've seen reviewers slam studies for slight under-representation of group X according to national statistics (e.g., low-but-not-zero Hispanic sample in a region with low Hispanic population) in studies where there was zero reason to believe that would impact things.
However you always-always-always report your sample demographics in as much detail as you can. And as someone who has done studies examining cultural influences on the brain, that blanket justification reveals a fundamental lack of understanding of both culture and brains.