Most hikers with persistent heel or arch pain have a familiar story.
They buy a pair of drugstore inserts. Then another. Maybe a new pair of $200 trail runners.
Eventually, someone mentions a custom orthotic system and the price climbs into the hundreds, sometimes well over a thousand dollars.
The price is not the whole problem. A rigid orthotic can make sense in a very specific treatment plan.
But on the trail, your foot is not doing always doing a controlled walk across a smooth floor.
It is adapting, rolling, braking, and absorbing a moving load across rock, roots, off-camber dirt, and long downhills.
In other words, in the long run, they nearly always fail the trail.