The job of the conductor is considered creative by definition. It is, but the creativity is in the translation of the language of the composer (notes) into the language of the audience (sounds). Concerts themselves are reproducible, it does not matter if:
> you listen to the orchestra or to the record,
> the conductor wears a white tie or not.
The truest creativity is in composing. Mozart did not wear his wig and his best suit when he composed. In their most productive years Beatles stopped performing alive and focused on composing. In the studio, without their rock uniforms and the pressure to look good and modern, they looked quite ordinary but created many of the best songs of modern rock music.