CFD isn't perfect, reality still has a few suprises, and serious R&D teams use CFD to hone ideas while still using wind tunnels, real water, etc on models or real life at 1:1 scale to final test and verify.
Your claim aside, we still see articles and papers such as:
CFD isn't perfect but better and cheaper. About once a year we try the real tunnel, but for the rest CFD is better. Esp. now with the new graphic cards
