Why, according to Indrani Debi, had the comet not been disastrous? Do you agree with her?

According to Indrani Debi, the comet had not proved to be disastrous because of the yajna that had been performed in their house.

No, the yajna had no impact upon the comet. The project undertaken by the scientists prevented the comet from colliding with the earth, thereby saving earth and all its inhabitants from destruction.