In both teaching and performing improvisation, I agree.
However, this DOES NOT mean to say that when we become involved in an Artistic or Scientific Enterprise as a Leader we should ignore the realistic needs of everyday life and the ever-shifting demands of the public that would support our Enterprise.
If Leaders ignore the needs of everyday life, we will no longer have the privilege of running sustainable Arts organizations. If Leaders ignore the ever-shifting demands and desires of the public, our work will cease to be relevant to the audience. And then, as an Arts Leader, we will have FAILED at providing that escape for the audience.