I totally agree with what Mickey7 said. Tier-1 ISPs are not available everywhere. Even in my city, there are some locations where there is only one ISP, that too provided by some local cable guy over cat-5e ethernet connected to a 100Mbps switch on the pole. There's no BSNL, Jio, Airtel in these locations.
My friend who stays in Sodepur, just got his connection upgraded to Fiber yesterday. So far, he was on ethernet and the net would go down every time there's a flash of lightning. Now these small-time LCOs, after realizing the benefits of fiber over ethernet are making to move to provide FTTH connections. But even then, they don't have the required expertise or minimum knowledge about how PON works, and they go on splitting and providing connections even at -30 dBm of optical power.
Unfortunately, for me, even though I have some Tier-1 ISPs in my area like BSNL & Jio, I can't buy a connection from them because of my requirements. For the things I do, symmetric speeds with an unlimited data cap, along with the option to buy a static IP are a must.