So your "facts" aren't really accurate. It's true that White and Asian students make up 70% of medical students, but they also make up ~70% of the applicant pool. In fact if you look at the data below from AAMC, you'll see that matriculant diversity is roughly proportional to applicant diversity.
Last year Asian applicants made up 19.2% of the applicant pool and accounted for 19.8% of matriculated applicants.
Last year White applicants made up 47% of the applicant pool and accounted for 51% of the matriculated applicants.
Last year Black/African-American applicants made up 7% of the applicant pool and accounted for 6.5% of the matriculated applicants.
Last year Hispanic applicants made up 6.1% of the applicant pool and accounted for 6.3% of the matriculated applicants.
If you're looking at MCAT and GPA, White and Asian matriculants had identical sGPA (3.69), non-science GPA (3.79) and cGPA (3.73) scores. Asian matriculants did have on average a higher MCAT score than Whites, but nothing significant - 32.8 vs. 31.8.
Also, the deviation* between average applicant scores and matriculant scores for sGPA was ~4-5% for Asian and White students and 7.5% for Black students. For MCAT, it was 10% for Asian, 8% for White and 7.5% for Black students. So in terms of expectation and leniency for applicants based on race, there is no divinitive trend showing higher expectations for a specific group.
*calculated as (mat. GPA - app GPA)/mat. GPA