I don't think being beautiful takes away from your credibility.
Being beautiful is all in the attitude, it's about confidence.
Elegance means being beautiful both on the inside and out.
There are more useful systems developed in languages deemed awful than in languages praised for being beautiful--many more.
I have no fear of being less beautiful, I've always been afraid of not being beautiful.
My limbs work, so I'm not going to complain about the way my body is shaped.
Beauty in art is often nothing but ugliness subdued.