Yup. This is how I’ve always thought of it, too.
I don’t know how many players can actually launch an effective 3pt jump shot. Not many, I expect. The sign of it is commentators typically praise someone who “sets their feet” in anticipation of the shot. The ambiguous case is players who leave their feet in the process of the shot so as to get an assist from their legs because their arms aren’t strong enough to be accurate from this distance. That’s not really a jump shot in my view, but I think lots of people call them jump shots because their feet leave the floor in the process.
Think of it in relation to the midrange jump shot Ash or Paige or Azzi takes. They take a dribble, stop and jump, and at the top of the jump or even a little after they release the ball. The force of the shot is not based on the muscles used in the jump itself, but is the result of wrist and forearms working to some extent in isolation from the leg muscles. Watch Paige’s signature inbounds jump shot in which she receives the ball on the right, goes up and releases the ball at the top. Occasionally she has to alter her body position in mid-air to evade a defender. That shot is all wrist and forearm, and that’s why she can alter it, do a fake, etc. after she’s left the floor.
Another feature of Paige’s midrange jump shot is the high release point. It‘s released above her forehead. Same with Azzi and Ash. Of the three, Paige seems to be the most acrobatic when it comes to adjusting the shot in mid air. But making any adjustments requires a high release point.
Now, applying this view of the mechanics of a jump shot, I think there are very few players who ave the hand and arm strength to release a true jump shot from beyond the arc. This is true on the men’s side, too. I know Azzi is strong enough to do this — she has really strong hands. It looks like Ash can as well. Unless their pressed by a defender, I think most players will shoot a set shot from 3, though they’ll leave their feet in the process.
Another thing to consider is players who do a slight ‘kip’ at the waist as they shoot from beyond the arc. Ash and Kaitlyn both do this. it’s worth reflecting on the mechanics of this movement.