"He has really benefited from the support that does exist, not just for him but for others in the community," Postecoglou said.
"Because he has benefited so directly, I think he's taken on the responsibility of trying to share that around now.
"It always makes more of an impact when it is somebody who is high profile or in a position where we think they shouldn't have any problems or we see it as a sign of weakness when they're looking for help and support.
"There's always a balance to these things. Whether it's (Richarlison) or anyone else, we all have challenges and problems in our lives.
"There's help that you can get out there and it shouldn't hopefully get to the point where it's so overwhelming that it takes over everything else you do.
"Credit to (Richarlison), he's sought help, he's got help - the right help - and now he wants others to benefit from it."