A tarantula's bite is not medically dangerous, it's just some mild to moderate stinging pain for a few hours. The fact that the villager passes out instantly from being bitten by a tarantula means the villager isn't just "not invulnerable", but has an extremely low pain tolerance.Villager just has super strength but not invulnerability. I haven't seen a tarantula move a lighthouse. And I don't think Villager has ever tried to punch a tarantula.