First, the awkwardness of the preferred language focuses on the disability in a new and potentially negative way. In common usage positive pronouns usually precede nouns. In the best of all possible worlds, where ignorance, stereotypes, and advantages over others do not exist, this might be the case. In interaction with others, disabilities are almost never ignored. Disabled people learn to manage such situations.
Many blind people are proud of the accomplishments of their brothers and sisters.
Just as black became beautiful, blind is no longer a symbol of shame. Finally, in the broadest sense this issue is a political one. There are many different kinds of people with various disabilities. Some groups may have progressed more than others in their effort to redefine their situations in the wider society. I know that many well-meaning professionals will disagree and wonder how anyone could question the benevolence of the preferred language crusaders.