Never underestimate the value of one person being brought to a saving faith. The only reason you and I know about Ananias is because of his willing response to God resulted in the conversion of this one man, Saul, who became the apostle Paul.
I think, for me, this story means determining to see adversity and ordeals as opportunities to see the spiritual realm more clearly, and to expect God’s glory to be revealed in the moment, even in me. Growth is not the goal, it’s simply the side-effect. The goal is to incarnate Jesus, reveal Jesus, and to become ever closer to Jesus.