Children are obligated to obey their parents because parents are responsible for their children and have the duty to guide and protect them. However, children are not considered "slaves" because they are loved and cared for. Likewise, wives are to obey their husbands, because husbands are responsible for their wives and have the duty to love, care for and protect their wives from danger and harm, which distinguishes them from "slaves."
Based on biblical teachings, we can establish a clear distinction between marriage and slavery. Unlike a slave, a wife serves her husband voluntarily and if she loves him, she is motivated to support him in every possible way. Additionally, a woman has the freedom to choose any husband she desires and benefits directly from the arrangement. She shares the same house with her husband, has charge over the children and household, thrives in society, feels safe and secure, and has a loving, caring, and protective husband.
One significant difference between a wife and a slave is that when a woman marries a man, they become one flesh. This means that the woman is considered a member of the man's family, and his family is obligated to treat her with the same respect and dignity as any other family member. Similarly, any children born to the couple are also considered members of the extended family, and are entitled to all the rights and privileges that come with it. In contrast, a slave does not have the same status or rights as a family member.