I agree with those to some extent, but as @Ekdal1378 mentions they are not a Competitive advantage, they count as a civ advantage but in front of any other civ, its just not something that has potential to turn the tables around.
Even at the higher levels I haven’t found a stream where the India player won after the sepoy rush or without a blunder by enemy. And trust me I have watched almost all of them, and I pretty much sure I have easily one of the highest Home City XP for India. and in teams I float around #900-1100 ranks.
I think of Indian Eco as a Batch ECO. Where the HP and Survivability of ur Elephants takes off a little pressure away from ur eco and ur Eco storage increases while the first batch of eles are alive.
And the next batch will again cause a sudden drop in current res. and between that u have to somehow try to increase ur margins.
IK it happens to all civs but U can really feel it with India while u play. It has a overall batch feel to its army and eco. (Maybe Im not able to express it well but I try . . . )
So once a watch of eco is ready U make a huge pop batch of military and hope It can survive 1.5x the enemy’s batch. and U make a new Eco batch with some profit. BUT THIS IS VERY VERY RISKY. and thats where the fault lies.