I like this sort of conversational writing style and it's my preferred style as well. But it's not actually much like natural speech. Anyone who's tried transcribing a recording of a conversation knows that they need to be cleaned up quite a lot to be readable. We don't actually talk in essay format.

Writing this way takes practice and probably a lot of reading as well to understand what you can get away with. People don't start out just knowing how to do it. Many people's native dialects are pretty far away from this style, so "write like you talk" wouldn't have the same results for them.