Spoken like someone who neither knows anyone with disabilities, nor realizes that they, themselves will likely be disabled at some point in their lives, and will both want and need accommodation at that point.
You're making things up about me (all untrue, incidentally) so you can write off my argument as heartless or something instead of actually addressing it.
You're attempting to appeal to societal utility when the issue at hand is the dignity and well-being of a small, often marginalized and underrepresented, minority of society. I believe that speaks volumes to heartlessness.
Yes, accommodating these people will cost society more (in terms of effort and money) than not doing so.
However, not accommodating these people comes at a huge cost to our society's legitimacy, reputation, and honour.
I'm not addressing your points because I do not believe they represent a worldview that is worth engaging with.