That's known as the "bandwagon fallacy": People in authority believe it, so it must be true. Homosexuality used to be a psychological disorder, at times treate

That's known as the "bandwagon fallacy": People in authority believe it, so it must be true. Homosexuality used to be a psychological disorder, at times treated by castration. Hysteria used to be a diagnosable illness in women for which they'd spend years in an institution. The psychological establishment has a very dark and nasty history, replete with "theories" that they all believed were justified - a practice that continues to this day.