Its that sometimes even when you have good intentions and try to help someone with their problems, it CAN make it worse. Greg insisting that steven didnt listen to the music properly wasnt out of maliciousness it was because its what helped give him purpose when he was stevens age and steven came to him about feeling like he has no more purpose. He was trying to help but he only know what helped him. Same with the diamonds. They all had their own ways of trying to make up for their past actions but they didnt know how to approach stevens problems in a constructive manner. They didnt have ill intent. Friends, while great to have, are not fountains of advice that can always help. More often than not, any none trained professional therapist would only be able to give advice based on their own personal experiences and that kind of becomes counterproductive in many cases because… well, humans are complex and everyone is different. What may apply to one person likely wont apply to another. It doesnt mean theres anything wrong with trying to help out friends, but sometimes the only thing that can be done is real therapy. Thank you for coming to my ted talks