Assessments are held to check the suitability of applicants. Experience is among the most important requirements, thus quite sensitive to correctness.
Definition of experience:
Experience is the knowledge or mastery of an event or subject gained through involvement in or exposure to it
Having long been involved in assessing, any entity gains experience in it. The same applies to people exposed to the selected, be it in training or on the job later.
If such involvment or exposure generates some pattern in the memory bank of individuals or companies, then it is not racism if some groups are more noticable than others, it is simply another form of experience.