Why are doctors so condescending?

I never understood why doctors in medical dramas act so superior and condescending to the lower level doctors. Especially Grey’s anatomy, Like Attendings to interns and residents. They act so superior and condescending and don’t treat them like other human beings, they treat them like little scum and low lifes and are very impersonal with them Unless they’re friends, dating or really close, I don’t understand it, can someone explain?
Why are doctors so condescending?
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