The Absolute Standard of Horizontal
As long as the 'body' is the standard, nothing will change.
I believe many instructors design sessions with the goal of aligning the body through an approach of 'body makeup from the skeleton'.
Recently, the idea that 'alignment is improved as a result of the process of improving movement' rather than 'moving to improve alignment' has become widespread. I also agree with this shift in order.
What I cannot agree with is what comes after that.
The means cited for 'improving movement' include correcting joint range of motion, correcting left-right imbalances, the quality of stability and mobility, the inner unit, and center of gravity control—all of these elements are evaluations based on the body itself.
If the standard is off, the evaluation will be off.
Evaluating the body based on the body means that even if the body itself is tilted or misaligned, you are using that as the standard.
The premise that eliminating left-right differences is a good thing is the same. Not a single part of the body is symmetrical. The heart is on the left, and the liver is on the right. Even the pelvis and ribs, if looked at strictly, do not have the same shape on the left and right. The left and right each have different roles.
Aiming for uniformity itself is not a goal.
Thinking in terms of muscles, or trying to adjust mobility and stability—at the point where these become the objective, the standard is fixed to the body.
The absolute standard of horizontal
Before looking at movement, decide where to place the standard.
Where I place it is horizontal. As long as we live on Earth, how the body is positioned relative to gravity is a premise that comes before any individual differences.
I grasp the position of the pelvis based on the horizontal, and from there, I look at the orientation of each joint. The discussion of alignment and the improvement of movement are things that come after that.
The phrase 'body makeup from the skeleton' is not bad. However, as long as the standard for looking at the skeleton is within the body, no matter how you try to adjust things, the starting point remains off.