Christians, why is being in a "flock" good?

I'v heard many many christians say they are part of their churches flock also say the lord is their Sheppard and so on. But do you guys actually take time to go back and think about what a flock actually is? Here's a definition of flock " A group of people under the leadership of one person, especially the members of a church." A flock just follows its leader blindly, even if its counter productive to the flock, but of course they dont realize this in most cases. If you look at a flock of sheep for example, the sheppard just leads them on until he can use them for his own ends. May it be using them for fur, items to trade, or dinner. I just want to know why a majority of you guys see being apart of a flock as something to be proud of and have pride in when its clearly not in your best interest in the long run.