The good Shepherd leaves His flock to search for the lost sheep.
The sheep that He leaves should be able to stay safe in the area the Shepherd left them protected in. If not, they leave because of their own doing, and the Shepherd has to go look for them too. Stop dissing the Shepherd, He's got enough work, it's the silly sheep that keep leaving for selfish reasons.
Yes, lost people are always more important. Once they are brought back to the religious communities, they will have more opportunities to learn about the commands of God and practice them. And finally, they may become more virtuous and knowledgeable than the priests.
In the past, pastors are considered as shepherds to look after the sheeps. Now, the sheeps have become equal or even more equal than them, so they can only show some dominant role among the wayward.
All dogmatic thinkers, pastors included, eventually get tired of hearing the same old sh1t. Really, when you think about it: does anyone ever come up with anything new at a church gathering? How many roads lead to the same slow death?
When the road gets straight and narrow, what does one do? They look for hitchhikers. People who are stranded in life and desperate for a bandwagon to climb aboard. This is why you see the vultures with their little watchtower magazine proliferate in poor neighborhoods, taking advantage of the desperate. I myself have never met more "religious" people in one area than I saw in prison.
So my answer? I never really thought of pastors as being especially "appreciative" of the "ones they have" in the first place. Where there is no quality, one looks for quantity.