This is bad, but 64 students isn't all that much. It pales in comparison to private colleges. For example, Harvard accepts about 1/3 of its students as "legacy". If you believe the lawsuits about Harvard's anti-Asian discrimination, that also affects hundreds of potential Harvard students every year. Once you consider that UC Berkeley is about five times larger than Harvard, and that there are at least a dozen top-tier private schools with similar policies to Harvard, this seems like a much smaller problem.
Read the article. 64 students (from the tiny audited sample) met the highest bar (direct email evidence of connection to donations etc.), to say nothing of other "strongly suspect" students, and the rest outside of the audited sample.