I don't think it's about needing to be angry so much, but rather the anger is a manifestation to other things happening in peoples lives.
it's more about fixing the core issues, however that can be really difficult because it seems like the demands of life are becoming more and more just for basic things.
Like sleep for example.
Sleep works wonders for mental health and coping, but with the cost of living getting higher, people need to work more, not for fancy or prestigious reasons but just for the basics.
They have less time to work on core issues, like getting enough sleep, mentally processing, working through what they need to work through
it's like getting the sniffles is a sign of a weaker immunes system, but a weaker immune system can easily come from just being run down.
so anger, can be likened to the sniffles?
and if you don't take care of the sniffles when they start, you can get A LOT sicker
ps. sorry for the ramble, lol

also, great post.
I like things like this, makes me think deep