Pandu formerly obtained the ancestral kingdom by virtue of his accomplishments. Because you were blind, you did not get the kingdom, though you have every accomplishment to obtain it.
पितृतः प्राप्तवान् राज्यं पाण्डुरात्मगुणैः पुरा। त्वमन्धगुणसंयोगात् प्राप्तं राज्यं न लब्धवान्॥