hi there, i have a question, hope someone in this field can help..

if one is going to pursue a career in this field of CG and concept art, is it required that one is familiar with 3D modelling and its software?

because since concept art is usually meant to help 3D artists to produce the final outcome, would knowledge in modelling help the concept artist come up with something that's not only aesthetic but also realizable?
thx.