Working in the middle is necessary, and often thankless, but true change, in my opinion, comes from decisive action that cannot survive on middle ground. I dare say all great advances come from radical action. But, the pendulum of change, while swinging wildly from time to time, eventually settles in the middle until a condition or conditions become intolerable, causing the pendulum to start swaying again. I cannot think of a single person who changed the world, or their piece of it, who was not revolutionary in some fashion.
Working in the middle preserves the status quo, which may be acceptable for periods of adjustment, but rarely, if ever, is the status quo beneficial for all. At some point, those who are not in power, those who are not adequately represented, those who are disenfranchised and marginalized — in other words, those who are not in the middle — will demand change and the pendulum will swing either to the left or the right.
I, personally, question the compassion and understanding of anyone who is entrenched in the middle, not seeing or not caring about the extremes on either side. For it is in the extremes where the greatest suffering occurs.