I suppose what can happen is people hear the big-name preachers, and they feel they aren't great enough or good enough to evangelize.
But Jesus did personal . . . one-on-one . . . evangelizing. And I personally think that could be what was the most effective! And Jesus made it clear how the good of Christianity is not what is possible with humans, but all God desires and commands is possible with God having us share all His good with Him.
And I think it was very important, how Jesus spent personal time with His disciples and others who believed in and honored Jesus.
Their calling was not only to go out to preach, but He chose them >
"that they might be with Him and that He might send them out to preach" (in Mark 3:14)
So, by the way, I now would say a call to preach first means Jesus wants to spend personal time with the person, so the preacher personally knows how Jesus is and therefore can represent Him well . . . including by example of how Jesus loves . . . after experiencing how Jesus has loved and shared with the person. And this includes talking about how Jesus is correcting us . . . not only about what we should not do, but how to relate.
Our small fellowship does some street witnessing. It's not easy. People tend to be indifferent or sometimes aggressive. We've had some good responses.
Amen, about how there will be good results > 1 Corinthians 15:58.
I think I have seen how a group can set up where they can speak, and people are free to stop and listen or listen to a few things while walking by. And what can happen is you can feed the sheep, and then the sheep can talk personally with people who need to be reached. It is important how the sheep need to be taken care of, so we are healthy examples who can feed and care for newborn adopted children of God.
So, in case the main focus is evangelism, this could be not the way to do it. To me, it seems that much of our New Testament is about how God desires to bless the sheep. And then our example can help win people who want what we have. They need to see how we are family, and God is personal with us . . . not distant and mainly theoretical and doctrinal.