Your reply could be, "dynamite comes in small packages too".
You should not care about the opinions of other people, especially family members. God loves you, and that is what counts. You are a major player in the kingdom of God. You are unique. You are special. You are one of a kind. You are the only one who is capable and can complete your mission here on earth. You do not need the approval of people to do your God-designed destiny for HIs kingdom here on this earth. God loves you, just the way you are.
In the name of Jesus, I bless you with the life of God.