TFS 1.X+ Why in getDefence() we getting fist skill as a defenceSkill

[BulawOw]

int32_t Player::getDefense() const
{
    int32_t defenseSkill = getSkillLevel(SKILL_FIST); << -- here can somebody explain cause i dont see a clear reason why fist skill is considered as a defence
    int32_t defenseValue = 7;
    const Item* weapon;
    const Item* shield;
    getShieldAndWeapon(shield, weapon);

    if (weapon) {
        defenseValue = weapon->getDefense() + weapon->getExtraDefense();
        defenseSkill = getWeaponSkill(weapon);
    }

    if (shield) {
        defenseValue = weapon != nullptr ? shield->getDefense() + weapon->getExtraDefense() : shield->getDefense();
        defenseSkill = getSkillLevel(SKILL_SHIELD);
    }

    if (defenseSkill == 0) {
        switch (fightMode) {
            case FIGHTMODE_ATTACK:
            case FIGHTMODE_BALANCED:
                return 1;

            case FIGHTMODE_DEFENSE:
                return 2;
        }
    }

    return (defenseSkill / 4. + 2.23) * defenseValue * 0.15 * getDefenseFactor() * vocation->defenseMultiplier;
}

so im taking my time and learning while checking out sources and after noticing this i just dont get why

 

[Azakelis]

Fist Fighting

Fist Fighting is the skill of fighting without any weapons. Using your fists is the equivalent of using a weapon with Atk:7, Def:5. The Tibian with the highest fist fighting skill is Shyx Sho from Talera with 110. Fist Fighting is not widely used. Since there are no weapons that utilize this...

tibia.fandom.com

Using your fists is the equivalent of using a weapon with Atk:6, Def:5.
(The actual Def value of fist may be wrong.)
So basically fist is considered a weapon too and like in the weapons case when skill of weapon is used (in case of no shield) the fist fighting skill is used when no weapon and shield.

 

[BulawOw]

got it, thank you