Why traditional martial arts palms are clasped on the thumb

Not exactly.

The more ancient styles of martial arts are mostly not clasped, because you have to practice the tiger's mouth to control the weapon, including the thumb clasped sword finger is also a fake sword finger.

The power of the palm strike depends on the wrist clasp, and whether you clasp your fingers or not has very little effect.

Simply put, the impact of snapping your fingers is a fraction of a percent, and the impact of snapping your wrist is a hundred percent.

When practicing, the thumb is used to close the Laogong point and promote blood circulation.

The actual combat, all kinds of techniques are to stretch, and not deliberately buckle, out of the fist and chopping palm is naturally closed, but also not buckle. When you are practicing, you have to grind your shin, and when you are in actual combat, you grind your shin to hit people?