I first noticed this phenomenon while reading an article about football star Colin Kaepernick. The author was talking about Colin’s family and kept describing his parents as his “adoptive parents.” The article wasn’t about adoption, and there was absolutely no need for the extra label. Some people seem to forget that when a child is adopted, his adoptive parents become just that: his parents. They are morally and legally responsible for that child. They are his mom and dad.
Of course, there are times when it’s appropriate to use the labels for clarification. If someone is talking about an adoption reunion, they may want to use the term “adoptive mom” to help clarify which mom they’re talking about. But usually, just “mom” will suffice.