A Warrior without a King
A professional picks her battleground or sphere of influence.
She knows that she needs to be the best in the world.
Picking to be good at something that will please the population of the world (planet earth) probably is not going to be feasible.
She needs to pick an environment that is much smaller, so her work will be much more visible.
You get to pick which environment your work exists in. So, if the environment is changing, leave and go somewhere else.