I don't believe it is possible to overcome these disabilities. For example, I am colourblind. This is caused by a hereditary disorder, i.e. a DNA issue. There is no way for me to have this 'fixed'. Perhaps some difficulties can be overcome (e.g. use coloured contact lenzes to change your eye colour or dye your hair to change your hair colour), but certainly not all of them.
And I also agree with what Haz said above me
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