Hmmm. Differing ideas.
Level Shoulders are a Goal, and
Level Shoulders are an Outcome.
I lean toward Level Shoulders only being an observable outcome. We strive to do good things with feet, legs, hips, et al, such that we end up In Balance - a genuinely worthy goal. For recreational skiing the lack of level shoulders helps in movement analysis to detect something amiss elsewhere. After addressing these elsewhere-issues properly we hope to see “generally level shoulders” to confirm successful movements elsewhere.
Having asked a group of students to, “Try and keep your Shoulders Level…” I now avoid this suggestion. It was a poor idea as shown by the comical contortions that resulted. They’d tried to level their shoulders with the rest of their body still doing the same old things. In my view using the shoulders solely as a Visual Cue for other things is preferable.
As to skiers actively thinking ‘Are my shoulders level’ while skiing, I do this myself as a perceptual check on how other things are working and not as a component that requires deliberate effort.
My thoughts on the matter originate in recreational skiing rather than racing. Several threads elsewhere go into detail on inclination vs. angulation and which is preferred in modern racing.
The thread goes into considerable detail on inclination and angulation and a myriad of other issues. The relevance here (to me) is that level shoulders is more important as a recreational skiing cue than as a racing cue.
D(C), what inspires your desire to stop tipping? An undesirable outcome? Coaching feedback?