There's a difference between beating your kid for no reason and spanking your child because he did something bad, and then explaining what he did bad. If you spank your child without telling them what they did wrong of course it's gonna traumatize them, it's a child so if you don't explain why...
Wait is it a bi weekly release now ? I swear it's not been a month yet. Not that I'm complaining, I love this manga and it always brings warmth to my heart