There is no verse in Matthew that shows Jesus actually teaching a crowd. All of Jesus’ teaching in Matthew was done in smaller venues, with small groups. The same was true for St. Paul. There are no texts showing Paul teaching crowds either. He preferred smaller, more intimate settings for his teaching, too.

There is danger in public witness. There is only hell without public witness.

St. Legion was the only person in Mark’s gospel who was healed, and then told to tell everyone about it.

Evangelization is up to the lay faithful.

Healing was a sign of Jesus’ agenda, but it was not the whole thing.