He’s not wrong. Pierce, KG and Ray all said it was easier to sacrifice for the team when older; they wouldn’t have been ready to do it. Bosh talked about his struggles as a third fiddle.
Young guys, by and large, don’t have the patience to “wait their turn”. That’s both good and bad, depending upon whether the guys can fit within the team.
I mean, Jaylen would probably be having a better statistical year if he wasn’t giving up minutes to Hayward. Do you think he’s unaware of that? And on a lot of nights, that sacrifice might even hurt the team. It takes a ton of maturity to stick to a defined role when you know you can do more.