I made the claim that we are more similar than different based on the average person, which excludes those with disabilities.
Well, if you work from the premise that cognitive abilities are black and white rather than running along a spectrum, it makes sense. However, since most things operate along a spectrum, it's not as clear cut as you want to make it. You are even trying to settle the argument "are we more the same or are we different?" with an either/or answer. However, that too, runs a spectrum.
The 3 methods of learning that I mention are clearly using different parts of the brain for processing. One of the abilities does not have to be significantly disordered for another to simply function better while both fall within the "normal" distribution. Two people whose blood sugar falls within the "normal" range can still have very different blood sugar levels. The point at which it is considered disease is not when it varies
at all, but when it varies enough to create a significant problem (with significant usually being defined by someone other than the person with the problem). If the patient feels that their energy is hampered by fluctuations, they may benefit from doing something about it even when their glucose levels fall into what doctors insist is the "normal" range.
"Normal" (ie: non-disabled) humans might all use visual, auditory and kinesthetic learning abilities which make us similar. Any one individual may fair better using a specific one, which makes us different. Someone does not have to be
incapable of using the other two to fair better with one, just as one does not have to fall into the "diseased" category to benefit from monitoring glycemic intake. If a dance teacher talks a lot giving descriptions to someone who would catch on better by
seeing the move, then the student doesn't pick it up as fast as they might. If there is any subject where the differences in the 3 learning styles can be readily observed, it's in teaching dance!
The bottom line is that we can be both similar AND different. Trying to decide which is more significant is pointless because if only one was studied, we would miss out on half of the potential knowledge to be gained.
Yes, things change and new information often revises previous modalities. But often the new theory gets revised again and you end up back where you started. The idea that visual, auditory and kinesthetic are completely interchangeable with
no affect is not proven beyond doubt either.
Studying what makes us the same is important. So is studying what makes us different.
We are both of those things. Focusing on one will never give all the answers.
Duality is a pain in the knat sometimes, but an unavoidable fact of life.