Hmmm, No real advantage of the bassinet when flying SQ J. The seat is so wide, there is loads of room for baby beside parent. Also when seatbelt sign is on baby is not meant to be in bassinet so parent has to remove (which probably wakes up) sleeping baby each time the light comes on (and SQ are very trigger happy with this). Also bassinet are often cramped so many babies will prefer to be beside the parent where there is more space and they feel safer, which makes them more likely to sleep rather than scream.
I say don't worry about the bassinet, especially on SQ J
I certainly agree the J seat is wide, but otherwise I would have to disagree that there is not any real advantage. Our infant slept three hours SIN-NRT in the bassinet recently and that meant for half the flight we could watch a movie, get up and stretch, have a meal without having to physically hold the baby. That's great relief.
Btw, when baby is screaming, we do not just leave the baby in the bassinet. I don't know many parents who would just let their kid keep screaming in the bassinet.