The goal of accessibility is to meet the needs of the minority because they’re often forgotten.
Everybody experiences temporary disabilities, so it would be more correct to say that the goal is to meet the needs of everyone.
In general, the more accessible an interface is, the less aesthetic appeal it has. Highly accessible interfaces are easier on the eyes of the visually impaired, but harsher on the eyes of the normal visioned. On the flip side, highly aesthetic interfaces are easier on the eyes of the normal visioned, but harsher on the eyes of the visually impaired.
This is a big claim. Do you have a source? Personally, I have excellent vision, but I still prefer interfaces that have high contrast. It’s just more readable.
Accessibility extremists tend to discount aesthetics.