No need to worry, I've flown UA in that corridor 6 times in the last 2 months. The EWR-BOM/DEL routes and SFO-DEL routes will regularly use that corridor as it's the only sliver of Afghanistan that is allowed per US NOTAMs currently. Being sandwiched between the Himalayas and Afghanistan means there's really no other feasible corridor US planes can take while having sufficient fuel to operate all the way back to the US non-stop. Even so, back in 2020 I flew EWR-BOM twice in January right before covid and we flew straight over Iraq during the time US had serious beef with them. We just climbed to FL350 for the duration of the time we flew over the region. Altitude is our best friend in this part of the world which we must fly through to travel between the US and India. No other possible air corridors with given fuel

Afghanistan is mountain region but not to the extent of the Himalayas. The US routes generally don't have enough reserve fuel to maneuver over the minimum altitude needed to cross over the Himalayas (especially 77Ws) and in the case of decompression these planes would have to drop to 10,000 which of course is instant death in that region. Additionally, clean air turbulence is widespread all around the Himalays and makes maneuvering the planes hard, plus lack of feasible detour options in the case of emergencies.