Something that helped me and I think you're thinking about it as I did. If you're standing tall it sort of makes you feel like you're some sort of inverted pendulum like a metronome and that the move is that you're leaning away, and then that your body needs to do that inverted swing up over the ski to the other side of the ski. In which case your head and shoulders need to come UP and Over the center of the ski to change edge.
So this is I believe from Joel Howley's phrasing if I recall correctly but if you are skiing tall with your head and shoulders and handle sort of on a single height above the water, then if you try to maintain that height or plane that you're skiing in but soften your knees that action of softening the knees even with maintained connection/pull is going to result in the ski moving under you and away. This means the only true lean lock has to occur when you start out so compressed that there is nothing else you can do but let go or give up and be pulled up and over the ski to the inside.