Jump shot can also train jump range, which is IMO one advantage for jump shot training over 1v1.
Jump shot alone is trained rather well with 1v1 for guards, however for forwards the jump shot training is considerably lower.
You can check out this video Bubbles created about training, I think it really sums it up rather well.
(https://youtu.be/yN_0E74KkqY?si=6fq9oS-lzkPP2-BA)