Listen to it again. Honor thy father and mother that thy days may be long in the land which the Lord thy God giveth thee. He was talking about the nation, not the individual. When this commandment is disregarded, then the foundations of the nation are weakened. We know precisely why this is among the ten commandments.
National survival depends upon gratitude.
He who is ungrateful makes a poor citizen. Poor citizens make a poor nation. We see the fruits of it in family life. A lot of parents feel unappreciated. If you wonder about the frustrations that sometimes seem to grip them, that may be the reason.