you can run, be a dancer, be even a climber and a hillwalker and not have horrible feet.
modern sports shoes mean you don't need thick, hard skin to cushion or heavy calluses to do these things.
it's a matter of time, tbh, and not wanting to take such time as it takes to keep feet up.
and that's fine.
but seriously, don't make excuses.
i always saw my feet as a tool. i remember when i was 15 and got my first job, in retail, and my supervisor saying, 'always be kind to your back and your feet, it's hell when they go!' and just sort of took it to heart.
i've had blacked big toenails several times, i just painted over them with nail varnish .
but if it's not such a priority for some, hey ho.
flexitol cream is not expensive. a little goes a very long way.
personally i don't want cracked heels because that looks fecking painful, but if it doesn't bother people it's a free country.