With more tanks having laser warning and having to keep your laser on target which means if you get shot out, turning hard will loose lock on the target and the bomb misses. On the other side if you have it locked and that target is destroyed, you do have the option to target another vehicle to try and get a kill. With the TV guided once its released you don’t get to re-designate a target mid drop, but you are free to attack another target or go defensive with out having to worrying about maintaining a lock.
I personally prefer TV over laser. Laser does have some benefits but I feel that TV allows for much better multitasking which helps a lot when enemy spaa is up.