Stable systems are not static, they are just sufficiently damped that they don't oscillate uncontrollably [1].
I'm not satisfied with your response, but I'm losing my grasp on the analogy.
What are we dampening? Inertia, no? Imparted by the environment, and/or our own (fundamentally, inevitably) inaccurate thrust vectors?
It's a metaphor, so I guess we can only argue about the level of abstraction at which to apply it. I'm certainly glad I don't need to mutate and grow new internal organs just to cross the street, but I can be grateful for the mutation and growth of an ability to synthesize Vitamin D which allowed my ancestors to cross glaciers—two activities which are, arguably, helpful in maintaining homeostasis.