Rather: “If a serpent without enchantment (i. e., not being enchanted) bites, then there is no advantage to the charmer”: i. e., if the charmer is unwisely slack in exercising his craft, he will be bitten like other people. See Psalms 58:4 note.
Related Commentaries of Ecclesiastes 10:11
Ecclesiastes 10:11
11 Surely the serpent will bite without enchantment; and a babblerd is no better.