It may be that she teaches or shares from these about Jesus because it is here that His life and word are recorded. There are other places in the New Testament that we can learn about what Jesus taught as well, but most of it is here, in the Gospels. His words, when seen in red letter Bibles or by quotes pertaining to Him, are indeed in more than the Four Gospels. But many have not even begun to learn what Jesus taught. They (or, we) know nothing or next to nothing of His word. It is only an opportunity to help people to learn or know how to learn of or from Jesus for themselves. Each one, each person, that hears of Jesus and the Gospels can turn there in their Bible and learn from that which has been recorded in written form. Many women will see what meshak has written and find that they can read the Bible and learn about Jesus and His word for themselves.
Consider one of various passages in Matthew thru John like the following:
Matthew 8:1 When he was come down from the mountain, great multitudes followed him. 8:2 And, behold, there came a leper and worshipped him, saying, Lord, if thou wilt, thou canst make me clean. 8:3 And Jesus put forth his hand, and touched him, saying, I will; be thou clean. And immediately his leprosy was cleansed. 8:4 And Jesus saith unto him, See thou tell no man; but go thy way, shew thyself to the priest, and offer the gift that Moses commanded, for a testimony unto them.
He has just instructed that individual to go and have animal sacrifices offered to the LORD, per the Law of the Leper commanded by God TO ISRAEL through Moses, in Lev. 14.
Would you "follow Jesus" in this?
If so, why?
If not, why not?
Just two questions you might consider reflecting on.