Yup. Equality is unhelpful in the real world past a certain point. It’s better to think of equitability instead. Colour blind people can become pilots, but their rating is limited according to the extent of their condition, such as being banned from night flying, or not being given a commercial licence. So they have equality in being allowed to train and to take the medical assessment, and equitability in being treated differently due to their specific circumstances rather than in general terms.

As there are already restrictions on who can be president, it’s not too much to ask that they also be of sound mind. The equitable (indeed only sane) thing would be for anyone with dementia to be immediately removed from the military chain of command.