Arjuna has the right to perform his prescribed duties because that is his adhikāra or qualification. He is not qualified to meditate peacefully like a brāhmaṇa. He should not try to imitate.
You have a right to perform your duty, but…
Arjuna has the right to perform his prescribed duties because that is his adhikāra or qualification. He is not qualified to meditate peacefully like a brāhmaṇa. He should not try to imitate.