When your feet are out of shape and you stand around all day, it can put too much stress on the arch of the foot. Or other areas, even up your legs depending on posture, fitness, and what you’re doing with your feet all day. Even just walking a lot can really suck if you have arthritis or simply allow (aka forced via work schedule) your feet to get overworked and on the down side of recovery.

To be fair, it’s not ever the boot doing the fucking. It’s just not helping your feet survive. Even basic arch support goes a looong ways towards staying comfortable for many people.