It's true! we all have a strong side.
It's true that some times it is a physio issue stemming from an imbalance in strength or range of motion
It's true most times it is an alignment issue which can be easily corrected by a skilled boot fitter with strong alignment experience and knowledge.
It's true anyone can compensate for these misalignments without addressing the cause of the problem
It's true that removing these impediments to progress will increase your performance, comfort, enjoyment, and safety of the sport
It's true that many skiers try to ignore the above truths.
Misalignments on the frontal plane, leg length discrepancies, foot and ankle issues, past injuries, can all play role in turning symmetry. The three parameters to assess are foot/ankle alignment with a well made footbed, cuff alignment, and sole canting.
Misalignments on the sagittal plane will affect your stance and balance. The four parameters to assess here are ramp angle inside the boots, cuff forward lean, delta angle (outside the boot) and binding mount position. You will find fore/aft balance difficult if these parameters are not accurately set for your personal needs and one ski skiing very difficult as well.
One can avoid the truth all they wish, but if you are serious about skiing your best and maximizing your skiing enjoyment while on the slopes, addressing poor alignment issues by having your boots balance will increase your enjoyment of the sport instantly and offer the best bang for the buck spent! Instead of purchasing that new ski or ski lesson to improve your skiing, spend it on finding and trusting a good alignment specialist and you will reap far greater dividends on your investment.