It started to matter less and less and some people were convinced we should strongly hit the brakes on that because they believed they know better and non-falsi

It started to matter less and less and some people were convinced we should strongly hit the brakes on that because they believed they know better and non-falsifiable unconscious bias is the reason people won't intermix. There is just as much scientific rigor behind such statements as there is behind horoscopes, but it still became public policy and has a huge negative effect because it disunites people.