Even though I often didn't see my father for months at a time, I know he loved me as much as I love you, Son, and as he once said to me, 'I may not be the best father, but I will always send my prayers when you need them the most,' and that is what I intend to do for you. Remember this, even if you don't see me for a while and want to hate me, I love you.
What if potions and tonics had negative side effects? Potions of increased strength cause violent tempers, or damage joints. What if potions of dexterity caused tremors, or palsy?
What if they were addictive, and had withdrawal symptoms?
Could someone make a bad batch? No one use the brown strength potion!