>cares about your look more than your technical expertise.
In all fairness that's not what he said. Some companies - like google - have a very objective hiring process based almost entirely on technical skill. But many other companies include "fit" as a part of the hiring decision. I haven't interviewed at twitter but I could believe they are like that.
I've thumbed down candidates who did well on the technical part of the interview because I felt I wouldn't get along with them day to day. Not as extreme as "beautiful" people who are "ready to kick it", but more like arrogance or social awkwardness.