I think you may be surprised and hopefully disturbed by this UNICEF article.
Despite a steady decline in this harmful practice over the past decade, child marriage remains widespread, with approximately one in five girls married in childhood across the globe. Today, multiple crises – including conflict, climate shocks and the ongoing fallout from COVID-19 – are threatening to reverse progress towards eliminating this human rights violation. The United Nations Sustainable Development Goals call for global action to end child marriage by 2030.
So no, it was not "a long time ago." It's "hopefully by 2030."
Also traditions that, despite someone else's claim, probably don't cause any psychological harm, at least most of the time.
Oh, so as long as you don't believe the person and can therefore invalidate their feelings without guilt, and it only psychologically hurts "some" people who you I suppose arbitrarily believe over the ones you don't, it's fine?