Is "smartness" out of the league?

hey guys! this is my first question. I am an 18 yr old guy studying physics at a public university. At the same time I am also a theatre artist and musician (vocal). I have encountered many girls who were afraid to confront me with their crush feelings for me. When I told a girl I liked her, she was kinda shocked and when I asked why... well her answer was "I mean I am an arts ug and why would you.. a 'Physics' student want to date me?" I am not a nerd tho. Is being smart especially in Physics/science really attractive?
Is "smartness" out of the league?
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