Just because you do those things that doesn't mean you are unethical towards other human beings; you are only doing them for your self and not hurting others. If we realize we hurt others by our actions those things would weigh heavily on our hearts and we would strive to make things better. So what if we have physical incapacitations of any sort, depression is not easy to deal with. What we take upon our selves as a moral responsibility to others is a lot to for any one person to take up at any time.