Even people who majored in unrelated fields like engineering or the liberal arts probably took biochem, cell bio, etc through the 400 level. At least I did. But anyways, you do your fair share of "difficult and complex" thinking in any major. Don't act like Bio and Biochem majors are better than other people just because your majors are the traditional ones.
If nontraditional majors struggled (more than others) in medical school, adcoms would have got rid of them years ago. And you certainly wouldn't have people like Sinai
getting rid of premed requirements for large portions of their class.
There are more paths to medicine besides the traditional "study Biology/Biochem and go to med school at 22."
🙂