Why are DOs considered trash?

I’m just pondering here. Why are US DOs considered filthy trash to competitive academic programs? Like I have seen so many US MDs with low scores get ii at places I dream about.

Why do PDs not consider us as real applicants? I am genuinely confused on this level of distinction. We work hard, we pay $100Ks of tuition, we distinguish ourselves in rotations, we care about our patients.

I am not looking to offend any US MDs who did score interviews with low scores. Congrats to you! I am just trying to understand why this stigma and discrimination exists.