Why can singing in the wrong pitch permanently damage your voice?

I'll try a comparison.

You have a 35-year-old football player and as a trainer of him now demand that he sprint up and down the place, mainly and in devils. Or I'll go to heavy fights.

This is not because the player would get tired quickly or get hurt constantly. If the player could force himself to do this, he would not play for long.

It is necessary to use the body in the context of what it can do without excessive risk of injury or fatigue – everything else is abuse. If someone is good at singing deep and not high then he must use the voice accordingly.