Yes, anger has much value when one processes it with emotional intelligence. Let the emotion subside before acting on it but don't forget what caused the anger in the first place. I have written many pieces about things that make me angry but I try not to write them while in an angry state.

"Anger has value

Signals moral core raided

My space invaded

Blood boiling yet controlled rage

Saber of Light rules the page"

I discuss what inspired that poem and what the rage ended up creating (besides the poem), here: https://medium.com/know-thyself-heal-thyself/justified-rage-6ee693f47da0