Everything is right about this verse....
Galatians 4:4 "But when the fullness of time had come, God sent forth his Son, born of woman, born under the law."
In this verse we have the:
1 The Right Timing - when the fullness of time had come.... ~ God the Father knew the exact time to send his Son (Jesus).
2 The Right Son - Jesus as the Son of God was the right and only one to send to earth to accomplish redemption.
3 The Right Method - The incarnation (the Son of God being born of the virgin Mary) was the right method. Actually this was the only method if Jesus was to become a sin bearer on the cross. He had to become a human being. The virgin birth was the means that made it possible for him to be born sin-free.
4 The Right Condition - Jesus was born under the period of the mosaic law. The law was given to show man his sinfulness and his need for God. Jesus was born in the time period of the law and lived up to the standards of law perfectly (Matt 5:17).
Everything about God's methods are right. We may not understand them or they may not make sense to us but we can trust the creator, savior and Lord...because He's right.