Yes, but who wrote the NT? Luke was a doctor, and his Greek is a very high level. I have to read Luke and Acts with my lexicon in one hand. But God used him, despite his education and training, which is what you are essentially saying.
Paul was a highly educated former Pharisee, but he was also well trained in Greek rhetoric, philosophy and other things. And yet, God not only used him, he used him because of his background and training. Matthew had to have had some education to be a tax collector.
And then we come to John, the fisherman. His Greek is so simple, we were reading passages in the first semester of Greek. We had excerpts to translate for our final exam, if we pulled that verse. I didn't bother to read it daily, because it was so simple. I prayed, and God told me to read Mark 1. I spent a lot of time memorizing the new words, the verb forms, and yes, it got pulled first try. My professor said no one had ever said yes to Mark 1. Well, I did, and he stopped me to see if I had the English written into my Greek Bible. It wasn't as hard as Luke, but maybe even harder than Matthew and Paul.
Then there is James, who God used in a great way, as leader of the church in Jerusalem, and to write the book of James. His Greek is harder than John. And his message is very different, in some ways, but very needed. Oh, Hebrews, which is anonymous. Very high level of Greek, but also a tremendous understanding of the law, and how Jesus fulfilled it. I guess an educated Jew was needed for that book.
But of course, it wasn't those men, it was God. But, we get our systematic theology from Paul, mostly, and our history of Jesus and the early church in Acts and Luke, and of course, the other synoptic gospels. John was close to Jesus, his writings are very inspired.
There is no doubt God can use who he wants to preach the gospel. Or write it! But, despite your video, which is not what I was asking for, very few people who live on the streets can preach, teach, counsel, etc., better than a trained pastor.
I wasn't asking for a youtube video, by the way. I was asking for someone YOU know who is homesless, who knows more about God than a preacher. I would imagine though, if you lined up 100 preachers, and 100 homeless people, probably 95-98 of the educated preachers would know more about God and be able to communicate that knowledge than even one homeless person.
The fact is, if they really knew God, would they be homeless? Following Biblical principles in North America doesn't put you on the street.
Anyone can spend hours looking through youtube videos to find something that matches what they believe. And you have no clue whether it was scripted or acted, or really true. That is why I asked for YOU to give me the name of a homeless person that you know and can verify the story is true.