[user104658]

The main problem in my opinion is that no one is allowed to be clearly better than anyone else at anything. Everyone has strengths and weaknesses, but no one is allowed to point out their own (or other people's) strengths for fear of highlighting that it's a weakness for someone else. Like you can't say "Sue is brilliant at maths!" in a school setting any more... because it might upset Betty who isn't good at maths. But then you can't point out that Betty is the best in the class at writing stories, because poor Sue shouldn't feel inferior. So this culture of "everyone is doing their best and no one is any better than anyone else!" has arisen... which actually doesn't make anyone feel particularly good. It also allows people to not actually bother doing their best... because so long as they can convincingly claim that they are, "it's all good".