I don’t follow your blob comment.

The dentist analogy is just stating that a child with limited knowledge may think his father hates him for taking him to such a dreadful place. We are such small children. It’s perfectly logical to say that this argument is not necessarily valid because we don’t have all the counterfactuals as fallible humans. In other words, we think the dentist sucks, wait until all of our teeth rot out. The father cannot avoid the dentist. God cannot force humans to be perfect.