<p>You won’t learn much about practicing medicine in undergrad–but that’s how it’s supposed to be.</p>
<p>The purpose of choosing an academic (as opposed to vocational) major (eg the science fields you already listed) is to begin training you how to think about, research, and synthesize information into something useful–in other words, developing more sophisticated skills you will need to use in order to learn and think in the future. If your goal is med school, the purpose of undergrad is not vocational training (contrast this to say, teachers–individuals who want to become teachers learn specific skills to teach kids/students/whomever during undergrad, and can function as teachers right after graduating. Not so with medicine.). </p>
<p>As kdog pointed out, there’s some benefit to choosing a major such as biology because many of the premed prereqs will also be required for your major, theoretically freeing up your schedule to pursue other academic interests (other majors or minors, more in-depth study in your major, etc etc). But really, the most important thing is to choose a major that’s intellectually exciting for you–plus, you’ll probably be more successful in that field anyway.</p>