Because it's important, and it's important for us to give back.
English phrasal verb
give back
To return something.
Examples from real speeches
See how speakers use “give back” naturally, then open the full speech for more context.
And this was my giving back to society.
My prayer for you is that you invest in yourself and see the value of giving back and building your community the best way you can.
I always wanted to give back to the game.
He strongly believed that it was important to give back to the community and country in which one lived.
And for me, in the current state of things, you have to be able to give back.
He found new passions, and he continued to give back as a coach in his community.
Service through medicine, service through art, using whatever it is you produce, your product, as a way of giving back to the world.