Ficus encompasses many types. Prior to learning about Carica, Benjamina was all I knew, and I made many baby house plants of Benjamina just like you did by rooting in water. I just stuck them in pots in dirt, and didn't worry back in those days. They all grew, and I imagine Ficus Carica will do the same.
I got some that rotted too, but I blame it on the trip across the miles in hot summer heat. For where I live, and the heat we have, dormants are best for me. Not sure how dormants do rooting in water though.
Good luck to you!
Suzi