I had highlighted this issue again to the local Jio team. At first they were like, if your connection is working then why are you bothering about these. I had to explain them that other houses from nearby those FAT boxes couldn't take connection from those or need to take from far away FAT boxes due to this problem.
After some argument they told that the company ain't providing optical fiber materials anymore so they can not maintain the infrastructure these days. If one needs to take their fiber from Jio only then they can opt for their AirFiber because of it's wider availability.
I asked them whether the already fiberized areas would be maintained in future or not? – to which they replied if we get sufficient materials and order from company, that will be done.
It seemed they have less materials which they are keeping for emergency purposes only because new fiber materials won't be given by company anytime soon. I don't understand what's wrong with Jio these days because after all it's owned by the richest person in our country!