Sorry but I dont know who is Natalie Portman. Given that you said she is a Harvard graduate and an actor from what I have observed most of such graduates in India give up their original field to pursue entertainment once they see success in that area commercially. The ones who stick to both usually don't seem to be sure or appear to come across as confused to me. At the least even if you choose to have multiple careers there has to be a connect or interrelationships of some kind between them, I see no connect between medicine and music in any manner. Yeah a doctor can sing for a hobby but to make that as a career is just something I cannot appreciate.
Natalie Portman is an Oscar winning American actress and she studied whilst acting. It's okay you are entitled to having an opinion. I don't mind. My own GP sings and plays guitar in a band, granted not very successfully, but he does it and he sings songs to patients too lol - which can really at times help in the waiting room. So to each its own.
I personally am not a huge fan of either Umar or Simba but it was good to finally hear Simba say something with conviction. Did I enjoy the fight? No, but I prefer the mind games compared to fights so I doubt I ever will. Karan, Jay, and Vishal whom I do like if they fight I don't admire much.