how would you say "rightfully so"?
So and so says, and rightfully so, that...
2 Answers
I would say "con razón".
Con mucho justicia, .....
you want to express fairness or justice in this expression so I believe this would be one way to translate this phrase.
Also another way con mucho razón
- you would want to use mucho to express so as it is used in your fragment.