Her justice! And remember Hizdhar then tells her she crucified his father even though his father was against crucifiykng the children!!
This entire scene lays out the fundamental differences between Dany and Jon!
Seriously won’t go into all the times she’s talked about taking what’s hers, what she’s owed by rights (which spoiler she doesn’t have the claim!!) — when has she ever tried to actually break the wheel? The answer is never. Bend the knee?
This stands in for all the other times people around her have cautioned her not to impulsively burn entire cities to the ground