See you new it already that the NHS have podiatristJohn visited an NHS podiatrist (free) every three months for some years.
John must of had some illness with his feet ( or can't do it himself because of the dementia ) if that the word to use ( illness) . when I said must need have some illness like dietetics to get it free on the NHS , not just needing nails cut , like you and me just because we don't like doing it ourself
We are thinking on different levels your thinking of where the word come from podiatrist.
Where I am thinking about the different training of the podiatrist & a chiroepodist.