Couldn't God have made it easier on these fishermen and had the fish jump right into the boats? Aren't there many congregations who think that way about their own "growth"? If God wants us to grow, God will have the crowds flocking to our doors.
Think about customer service. An employee could simply tell you on what aisle you will you find your desired object. But some employees stop whatever they're doing, walks WITH you, and takes you to the aisle, pointing to the item that you need. Then they ask, "Can I help you find anything else?" What's the difference between accompanying someone vs. just telling them when it comes to evangelism?
In this analogy, we are the employees, not the customers. How many members see themselves as church customers instead of helpful employees, eager to help other people find what they need?