Just curious- what would that have to do with anything?

Let your arms hang loose at your side and practice swinging your hips around and letting your arms swing outwards just from that motion. That's the feel you want to initiate the pull. Next practice thinking your hips and torso are the hand that cracks the bull whip and your arm is the whip. Practice holding your arm in back of you in tjat reachback position then use your hips and torso to pull the whip.

It qualifies the source of the advice.

Who would you rather listen to regarding throwing form: someone who throws in the 400s or someone who throws in the 300s?

Who would you rather listen to about running: someone who runs a mile under 5 minutes or someone who struggles to break 10 minutes?

Who would you rather listen to about getting stronger: someone who has an elite powerlifting total in competition, or someone who benches 205 with a huge arch in their back and their butt coming off the bench?

Not to say that the less qualified can't be the source of useful information (can learn from their mistakes, have insights more appropriate for that level, etc.) but it is a quick way to evaluate the likelihood of the quality of the information.

I think the poster who asked was trolling.

You don’t know how a ball and socket works do you ?

Well enough to know that the ball and socket where the leg attaches to the pelvis is the ball and socket "hip" joint. When that joint turns inward it's called the internal rotation if the hip joint- thus why I said you can't turn the leg inwards without the hip joint rotating. That's why they call it hip internal rotation. Thus why I said watch the rear leg because when it starts turning inwards or forwards toward the target the hip joint on that side is rotating. The rotation of the hips lead to the actual movement or rotation of the pelvis.

i.e. "Brace"

The strong "brace" happens during the dynamic hip rotation.

Bracing is dynamic.

This will be an interesting discourse. We’re all ears.