That was probably because he had a 99th percentile on the LSAT. Some MBA schools also offer admissions to people that have high GMAT scores. The fact that these types of schools don't even bother looking at transcripts and other personal info is perplexing.
When it comes to Dental Schools however, I don't think any of them are that ignorant. Yes, some have 1000s of applicants, but believe me, all your extracurriculars, your personal statement, and your grades are thoroughly reviewed even if you're accepted somewhere without an interview.