The first problem is that although Jesus seems to prohibit the use of the term teacher, in Matthew 28:1920, Christ himself appointed certain men to be teachers in his Church: Go therefore and make disciples of all nations . . . teaching them to observe all that I have commanded you
Jesus told his apostles to go out and preach the gospel with out attaching titles to them selves, they were to preach the gospel not build up their own names.
That is most likely why most of them are not heard from again but the gospel was preached.
Paul, that may be a different story as far as I am concerned.
Another example of the Catholic doctrine coming from Paul while Peter is just a figure head.
I don’t believe that the Apostles were “building up their own names” as they were martyred for Jesus.
The Gospels were about Jesus, not about the lives of His mother or the Apostles.
The Apostles did God’s will not their own.