why we should wear insoles? Let me make a metaphor
The only contact a car has with the road is through the tires on its wheels, so the condition and alignment of the tires and wheels have a profound effect on the car's driving performance, imagine the quality of a ride in a car with one unaligned wheel, if it's badly out of alignment, the ride will be rough, and the car will probably develop mechanical problems. In the same way, a poorly aligned foot can make walking difficult and even painful, and it can have profound effects on the rest of the body.