You aren't the first person to walk down this path. Really it's just arrogance; you think you understand things about which you actually know very little. By the way, no one's trying to put you down because of it. We were all in your shoes at one point; like
@Law2Doc, I also naively ignored the advice of others and mistakenly thought I knew better. Would you be offended if someone told you that a tenured professor knows more than you about the intricacies of an academic career and a whole host of other things about the profession? Of course not. What's the difference here?
At the end of the day, it's a futile point. You're gunna believe what you're gunna believe. Just be sure to report back in a couple of years and let us know how wrong you were. You won't, of course, but we'll celebrate the quiet victory nonetheless. Medicine is very much an experiential vocation. Your background, whatever it may be, is pretty irrelevant. It's highly unlikely that it's going to make you any more learned than people that have actually gone through the process themselves. In contrast, your accomplishments thus far are limited to getting accepted to medical school.
Again, this isn't meant to put you down - it's just illustrating the gulf of experience that separates you and those you're arguing with. You shouldn't be so quick to disregard that.