My younger sister was much more compliant than I was and I heard that kind of statement myself.
It does not endear the hearer to the sibling.
Nobody can live up to the example set by Jesus, and it would have been near intolerable to have a sibling who was so perfect, to whom you’d always be compared.
Jesus sibling: “Mom, you never yell at (spank) Jesus.”
Mary: “That’s because he never does anything wrong.”
Even here, in Scripture as adults they are taunting Him.....
John 7:1-5 1After this Jesus went about in Galilee. He would not go about in Judea, because the Jews were seeking to kill him. 2Now the Jews Feast of Booths was at hand. 3 So his brothers said to him, “Leave here and go to Judea, that your disciples also may see the works you are doing. 4For no one works in secret if he seeks to be known openly. If you do these things, show yourself to the world.” 5 For not even his brothers believed in him.