Probably you misunderstood it, I am just saying that is one scenario that can happen on paper and the same is being told by others as below.
Mind you, India sitting at the top comfortably with 4 points but their qualification is not a sure thing, just yet. One scenario can ruin the party for the Indians.
- Australia thrashing India in the last encounter and denting India's NRR.
- Afghanistan giving the same belt treatment (similar to Kiwis) to Bangbros and possibly boosting their NRR.
I know this is unlikely to happen as India is one of the best teams that should reach the finals. The other team who is looking threatening at the moment is Afghanistan and the reason is their spirit. You won't find such a spirit in any other team currently.