To be more explicit, sports like crew, lacrosse, fencing, and such, are dominated by kids from wealthy families. They are generally expensive, needing expensive equipment and expensive training locations, and are the sort of sport that you find in expensive private high schools.
They are, at the present, dominated by White kids, but that will change as the demographics of the upper class in the US changes. From the point of view of colleges, they do not care much about the ethnicity/race of these kids, just that they tend to be full pay, legacies, and donors.
The point of these sports is that they allow colleges to admit a larger proportion of wealthy students than they could, if they were admitting based on their present admissions policies.
Even MIT, with its vaunted “no-legacy” admissions policy, has 20%-25% of their students participating in varsity athletics.
Having wealthy kid sport, except in some cases, is not about accepting unqualified wealthy applicants. It’s about selecting the wealthier of the applicants who are in the range of “qualified”. It also pays to remember that, given two applicants with same innate academic talents and abilities, the wealthier of the two will generally have a higher GPA, higher test scores, and more impressive extracurricular activities. That means that varsity athletes for these “wealthy kid” sports usually have a double advantage - that of wealth and their sport.
Alumni who were athletes are also more likely to donate, so that both increases the financial incentive for colleges to have athletic admissions, as well as having further incentives for colleges to recruit athletes from families which are already affluent.
https://www.gallup.com/education/312941/ncaa-student-athlete-outcomes-2020.aspx#:~:text=This%20study%2C%20conducted%20by%20Gallup,greater%20rates%20than%20non-athletes.